I got my answer.I just replaced getElementByName with getElementById var searchText = document.getElementById("search").value; Also whenever I typed the text I was pressing 'Enter' button instead of using onClick event. document.getElementById("MyElement").className = "MyClass"; (You can use a space-delimited list to apply multiple classes.) Is there a standard function to check for null, undefined, or blank variables in JavaScript? It thinks the variable username is null. Yes, man, actually, the 'main' bug that was bothering me was in call the "popularCombo" function. It appears that you're using the Router from react-router-dom, and not the one from the react-location library, which is the one which provides the useMatch() hook that you need.. You need to use the Router from react-location, and then link your with the react-location library by passing an instance of ReactLocation via the location prop. Background should be thought of as headless (though in mv2 it is possible to view the generated page, but actual user will not see it). This may happen in cases when your component is a nested child of a component rendered by the Router or you haven't passed the Router props to it or when the component is not linked to Put another way, your element does not exist. I've tried this and still get Uncaught TypeError: Cannot read properties of null (reading 'appendChild') but now for document.body.appendChild(newDiv); Samuel Van Bladel Oct 21, 2021 at 12:11 The following worked for me. A Window object and a dedicated worker that it created. ; A worker (of any type) and a dedicated worker it created. However, you are trying to run it on an array of elements var text = document.getElementsByClassName('js-text');.This method returns an array of all elements with that class name. See more linked questions. Uncaught TypeError: state.productDetails is not a function Hot Network Questions How would a city/town exist inside the territory of a country but the country chooses not govern it? Try by putting it inside DOMContentLoaded event Sorted by: Reset to default Highest score (default) Trending (recent votes count more) Date modified (newest first) Date created (oldest first) html { scroll-behavior: smooth; } There, I got the exception by passing the line So I guess you want to change that to: So I guess you want to change that to: Try by putting it inside DOMContentLoaded event document.getElementsByClassName returns an array. Similarly in statically typed Java this won't compile: public Object foo() { return 42; } foo().signum(); Sorted by: Reset to default Highest score (default) Trending (recent votes count more) Date modified (newest first) Date created (oldest first) Hey! That is the code, when I use FormData : var form_data = new FormData("#my-awesome-dropzone"); when you call Logout at onClick you are calling hooks from your function Logout outside of a component body, what's is not allowed.. You can abstract your Logout logic to a custom hook where it returns the logoutUser function:. Is there a standard function to check for null, undefined, or blank variables in JavaScript? html { scroll-behavior: smooth; } How can I reset the WindowManager resolution and DPI settings in the Google TV user selection screen? If there is only one such element, you could use the array indexer to retrieve the first one. Put another way, your element does not exist. The .select() method does indeed retrieve the text from a field. In my case, I use rails framework and require jQuery twice. Before you go too far down the rabbit hole of JavaScript-based smooth scrolling, know that there is a native CSS feature for this: scroll-behavior. Before you go too far down the rabbit hole of JavaScript-based smooth scrolling, know that there is a native CSS feature for this: scroll-behavior. Check the (this) if you doing setState inside any function (i.e handleChange) check whether the function bind to this or the function should be arrow function . document.getElementById("MyElement").className = "MyClass"; (You can use a space-delimited list to apply multiple classes.) I'm basing this There, I got the exception by passing the line Stack Overflow Public questions & answers; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Talent Build your employer brand ; Advertising Reach developers & technologists worldwide; About the company To add an additional class to an element: To add a class to an element, without removing/affecting existing values, append a space and the new classname, like so: document.getElementById("MyElement").className += " MyClass"; Stack Overflow Public questions & answers; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Talent Build your employer brand ; Advertising Reach developers & technologists worldwide; About the company let myDivs = document.getElementsByClass('myDiv'); let text=myDivs[2].innerText; // Uncaught TypeError: Cannot read property 'innerText' of undefined Compartir Mejora esta respuesta If you still get Function not defined then do the following: I'm basing this Uncaught TypeError: state.productDetails is not a function Hot Network Questions How would a city/town exist inside the territory of a country but the country chooses not govern it? Uncaught TypeError: this.props.data.map is not a function I've looked at: React code throwing TypeError: this.props.data.map is not a function React.js this.props.data.map() is not a function. Removing the callback function would do the trick (function() { //comment this out //your code })(); //comment this out Removing the callback function would do the trick (function() { //comment this out //your code })(); //comment this out You can first check app/assets/application.js file. Neither of these has helped me fix the problem. but setProducts is an async function, too. The other problem is that you call setProducts in an async function. Uncaught TypeError: Failed to construct 'FormData': parameter 1 is not of type 'HTMLFormElement'. Removing the callback function would do the trick (function() { //comment this out //your code })(); //comment this out Stack Overflow Public questions & answers; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Talent Build your employer brand ; Advertising Reach developers & technologists worldwide; About the company There is no button in the background unless it is programmatically generated first. export default function useLogOut() { const history = useHistory(); // we don't useEffect here, we are only interested in function Put another way, your element does not exist. How can I reset the WindowManager resolution and DPI settings in the Google TV user selection screen? Background should be thought of as headless (though in mv2 it is possible to view the generated page, but actual user will not see it). Sorted by: Reset to default Highest score (default) Trending (recent votes count more) Date modified (newest first) Date created (oldest first) Neither of these has helped me fix the problem. From the docs, here is what it says with regards to Class.contextType:. 428 React - uncaught TypeError: Cannot read property 'setState' of undefined The problem is here: document.getElementById(elementId).value You know that HTMLElement returned from getElementById() is actually an instance of HTMLInputElement inheriting from it because you are passing an ID of input element. This may happen in cases when your component is a nested child of a component rendered by the Router or you haven't passed the Router props to it or when the component is not linked to So document.getElementsByClassName('rhap_progress-indicator') needs to also select an index of the array: document.getElementsByClassName('rhap_progress-indicator')[0]. The .select() method does indeed retrieve the text from a field. var myTable = document.getElementById("myTable"); var rowCount = myTable.rows.length; for (var x=rowCount-1; x>0; x--) { myTable.deleteRow(x); } when you call Logout at onClick you are calling hooks from your function Logout outside of a component body, what's is not allowed.. You can abstract your Logout logic to a custom hook where it returns the logoutUser function:. var myTable = document.getElementById("myTable"); var rowCount = myTable.rows.length; for (var x=rowCount-1; x>0; x--) { myTable.deleteRow(x); } function int() { var source = document.getElementById('j1_64_anchor').click; } is getting executed before the dom is ready. export default function useLogOut() { const history = useHistory(); // we don't useEffect here, we are only interested in function React - uncaught TypeError: Cannot read property 'setState' of undefined 134 react router v^4.0.0 Uncaught TypeError: Cannot read property 'location' of undefined I've tried this and still get Uncaught TypeError: Cannot read properties of null (reading 'appendChild') but now for document.body.appendChild(newDiv); Samuel Van Bladel Oct 21, 2021 at 12:11 but setProducts is an async function, too. ; A worker (of any type) and a dedicated worker it created. It is telling you that it cannot access the property innerHTML of null.In other words, that objUserID is null and that you cannot access a property of it.. 428 React - uncaught TypeError: Cannot read property 'setState' of undefined document.getElementsByClassName returns an array. Thanks for your support.. :) I needed to delete all rows except the first and solution posted by @strat but that resulted in uncaught exception (referencing Node in context where it does not exist). From the docs, here is what it says with regards to Class.contextType:. React - uncaught TypeError: Cannot read property 'setState' of undefined 134 react router v^4.0.0 Uncaught TypeError: Cannot read property 'location' of undefined Sorted by: Reset to default Highest score (default) Trending (recent votes count more) Date modified (newest first) Date created (oldest first) Hey! The Uncaught TypeError: Illegal invocation is located in the "jquery-1.7.2.min.js" file, Ajax function not working inside If condition in jQuery. See that your function is not in a callback function if you are using an external js file. That is the code, when I use FormData : var form_data = new FormData("#my-awesome-dropzone"); Sorted by: Reset to default Highest score (default) Trending (recent votes count more) Date modified (newest first) Date created (oldest first) In my case, I use rails framework and require jQuery twice. It thinks the variable username is null. I needed to delete all rows except the first and solution posted by @strat but that resulted in uncaught exception (referencing Node in context where it does not exist). Similarly in statically typed Java this won't compile: public Object foo() { return 42; } foo().signum(); ## 3 ways for binding this to the below function## The problem is here: document.getElementById(elementId).value You know that HTMLElement returned from getElementById() is actually an instance of HTMLInputElement inheriting from it because you are passing an ID of input element. await setProducts() And the last thing you have to do is checking response.data value. So you have to add await before setProducts. document.getElementsByClassName returns an array. Background should be thought of as headless (though in mv2 it is possible to view the generated page, but actual user will not see it). A Window object A and the Window object of an iframe element that A created that could be same origin-domain See that your function is not in a callback function if you are using an external js file. A Window object A and the Window object of an iframe element that A created that could be same origin-domain I got my answer.I just replaced getElementByName with getElementById var searchText = document.getElementById("search").value; Also whenever I typed the text I was pressing 'Enter' button instead of using onClick event. A Window object and a dedicated worker that it created. ; A worker (of any type) and a dedicated worker it created. If you still get Function not defined then do the following: Check the (this) if you doing setState inside any function (i.e handleChange) check whether the function bind to this or the function should be arrow function . I needed to delete all rows except the first and solution posted by @strat but that resulted in uncaught exception (referencing Node in context where it does not exist). It thinks the variable username is null. The alternative is to use document.querySelector('.rhap_progress-indicator'), which returns the element if it exists. However, you are trying to run it on an array of elements var text = document.getElementsByClassName('js-text');.This method returns an array of all elements with that class name. False. In my case, I use rails framework and require jQuery twice. let myDivs = document.getElementsByClass('myDiv'); let text=myDivs[2].innerText; // Uncaught TypeError: Cannot read property 'innerText' of undefined Compartir Mejora esta respuesta I think that is a possible reason. There, I got the exception by passing the line Is there a standard function to check for null, undefined, or blank variables in JavaScript? getElementById will continue to return undefined after checking naming or waiting for content load. function int() { var source = document.getElementById('j1_64_anchor').click; } is getting executed before the dom is ready. That is the code, when I use FormData : var form_data = new FormData("#my-awesome-dropzone"); There is no button in the background unless it is programmatically generated first. Check the (this) if you doing setState inside any function (i.e handleChange) check whether the function bind to this or the function should be arrow function . In order to make use of history in the App component use it with withRouter.You need to make use of withRouter only when your component is not receiving the Router props,. Sorted by: Reset to default Highest score (default) Trending (recent votes count more) Date modified (newest first) Date created (oldest first) The problem is here: document.getElementById(elementId).value You know that HTMLElement returned from getElementById() is actually an instance of HTMLInputElement inheriting from it because you are passing an ID of input element. It is telling you that it cannot access the property innerHTML of null.In other words, that objUserID is null and that you cannot access a property of it.. You can first check app/assets/application.js file. The following pairs of global objects are each within the same agent cluster, and thus can use SharedArrayBuffer instances to share memory with each other:. However, you are trying to run it on an array of elements var text = document.getElementsByClassName('js-text');.This method returns an array of all elements with that class name. Uncaught TypeError: state.productDetails is not a function Hot Network Questions How would a city/town exist inside the territory of a country but the country chooses not govern it? Using browser development tools see if you can call the function manually from the console. Stack Overflow Public questions & answers; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Talent Build your employer brand ; Advertising Reach developers & technologists worldwide; About the company Using browser development tools see if you can call the function manually from the console. The Uncaught TypeError: Illegal invocation is located in the "jquery-1.7.2.min.js" file, Ajax function not working inside If condition in jQuery. To add an additional class to an element: To add a class to an element, without removing/affecting existing values, append a space and the new classname, like so: document.getElementById("MyElement").className += " MyClass"; but setProducts is an async function, too. ## 3 ways for binding this to the below function## getElementById will continue to return undefined after checking naming or waiting for content load. I've tried this and still get Uncaught TypeError: Cannot read properties of null (reading 'appendChild') but now for document.body.appendChild(newDiv); Samuel Van Bladel Oct 21, 2021 at 12:11 You can first check app/assets/application.js file. It appears that you're using the Router from react-router-dom, and not the one from the react-location library, which is the one which provides the useMatch() hook that you need.. You need to use the Router from react-location, and then link your with the react-location library by passing an instance of ReactLocation via the location prop. 428 React - uncaught TypeError: Cannot read property 'setState' of undefined A Window object and a dedicated worker that it created. So you have to add await before setProducts. The alternative is to use document.querySelector('.rhap_progress-indicator'), which returns the element if it exists. var myTable = document.getElementById("myTable"); var rowCount = myTable.rows.length; for (var x=rowCount-1; x>0; x--) { myTable.deleteRow(x); } Uncaught TypeError: this.props.data.map is not a function I've looked at: React code throwing TypeError: this.props.data.map is not a function React.js this.props.data.map() is not a function. export default function useLogOut() { const history = useHistory(); // we don't useEffect here, we are only interested in function This may happen in cases when your component is a nested child of a component rendered by the Router or you haven't passed the Router props to it or when the component is not linked to Hey! Uncaught TypeError: Failed to construct 'FormData': parameter 1 is not of type 'HTMLFormElement'. How can I reset the WindowManager resolution and DPI settings in the Google TV user selection screen? when you call Logout at onClick you are calling hooks from your function Logout outside of a component body, what's is not allowed.. You can abstract your Logout logic to a custom hook where it returns the logoutUser function:. From the docs, here is what it says with regards to Class.contextType:. I got my answer.I just replaced getElementByName with getElementById var searchText = document.getElementById("search").value; Also whenever I typed the text I was pressing 'Enter' button instead of using onClick event. If there is only one such element, you could use the array indexer to retrieve the first one. Yes, man, actually, the 'main' bug that was bothering me was in call the "popularCombo" function. The following worked for me. So I guess you want to change that to: So I guess you want to change that to: See that your function is not in a callback function if you are using an external js file. Stack Overflow Public questions & answers; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Talent Build your employer brand ; Advertising Reach developers & technologists worldwide; About the company I think that is a possible reason. There is no button in the background unless it is programmatically generated first. So, whenever you call document.getElementById again, after that, you're trying to execute a string, hence why you get not a function. The following pairs of global objects are each within the same agent cluster, and thus can use SharedArrayBuffer instances to share memory with each other:. The following worked for me. Sorted by: Reset to default Highest score (default) Trending (recent votes count more) Date modified (newest first) Date created (oldest first) The contextType property on a class can be assigned a Context object created by React.createContext().Using this property lets you consume the nearest current value of that Context type using this.context.You can reference this in any of the lifecycle methods including getElementById will continue to return undefined after checking naming or waiting for content load. So document.getElementsByClassName('rhap_progress-indicator') needs to also select an index of the array: document.getElementsByClassName('rhap_progress-indicator')[0]. The Uncaught TypeError: Illegal invocation is located in the "jquery-1.7.2.min.js" file, Ajax function not working inside If condition in jQuery. In order to make use of history in the App component use it with withRouter.You need to make use of withRouter only when your component is not receiving the Router props,. document.getElementById("MyElement").className = "MyClass"; (You can use a space-delimited list to apply multiple classes.) function int() { var source = document.getElementById('j1_64_anchor').click; } is getting executed before the dom is ready. See more linked questions. I'm basing this So I guess you want to change that to: So I guess you want to change that to: It appears that you're using the Router from react-router-dom, and not the one from the react-location library, which is the one which provides the useMatch() hook that you need.. You need to use the Router from react-location, and then link your with the react-location library by passing an instance of ReactLocation via the location prop. So you have to add await before setProducts. Three options: If script is the last tag of the body, the DOM would be ready before script tag executes; When the DOM is ready, "readyState" will change to "complete" Put everything under 'DOMContentLoaded' event listener; onreadystatechange ## 3 ways for binding this to the below function## The .select() method does indeed retrieve the text from a field. Three options: If script is the last tag of the body, the DOM would be ready before script tag executes; When the DOM is ready, "readyState" will change to "complete" Put everything under 'DOMContentLoaded' event listener; onreadystatechange Try by putting it inside DOMContentLoaded event False. await setProducts() And the last thing you have to do is checking response.data value. Similarly in statically typed Java this won't compile: public Object foo() { return 42; } foo().signum(); In order to make use of history in the App component use it with withRouter.You need to make use of withRouter only when your component is not receiving the Router props,. So, whenever you call document.getElementById again, after that, you're trying to execute a string, hence why you get not a function. Uncaught TypeError: this.props.data.map is not a function I've looked at: React code throwing TypeError: this.props.data.map is not a function React.js this.props.data.map() is not a function. await setProducts() And the last thing you have to do is checking response.data value. So, whenever you call document.getElementById again, after that, you're trying to execute a string, hence why you get not a function. I think that is a possible reason. The other problem is that you call setProducts in an async function. The following pairs of global objects are each within the same agent cluster, and thus can use SharedArrayBuffer instances to share memory with each other:. Sorted by: Reset to default Highest score (default) Trending (recent votes count more) Date modified (newest first) Date created (oldest first) It is telling you that it cannot access the property innerHTML of null.In other words, that objUserID is null and that you cannot access a property of it.. To add an additional class to an element: To add a class to an element, without removing/affecting existing values, append a space and the new classname, like so: document.getElementById("MyElement").className += " MyClass"; Uncaught TypeError: Failed to construct 'FormData': parameter 1 is not of type 'HTMLFormElement'. Sorted by: Reset to default Highest score (default) Trending (recent votes count more) Date modified (newest first) Date created (oldest first) The alternative is to use document.querySelector('.rhap_progress-indicator'), which returns the element if it exists. Neither of these has helped me fix the problem. A Window object A and the Window object of an iframe element that A created that could be same origin-domain Thanks for your support.. :) The other problem is that you call setProducts in an async function. let myDivs = document.getElementsByClass('myDiv'); let text=myDivs[2].innerText; // Uncaught TypeError: Cannot read property 'innerText' of undefined Compartir Mejora esta respuesta If you still get Function not defined then do the following: False. Before you go too far down the rabbit hole of JavaScript-based smooth scrolling, know that there is a native CSS feature for this: scroll-behavior. So document.getElementsByClassName('rhap_progress-indicator') needs to also select an index of the array: document.getElementsByClassName('rhap_progress-indicator')[0]. Thanks for your support.. :) If there is only one such element, you could use the array indexer to retrieve the first one. Three options: If script is the last tag of the body, the DOM would be ready before script tag executes; When the DOM is ready, "readyState" will change to "complete" Put everything under 'DOMContentLoaded' event listener; onreadystatechange Stack Overflow Public questions & answers; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Talent Build your employer brand ; Advertising Reach developers & technologists worldwide; About the company