So document.getElementsByClassName('rhap_progress-indicator') needs to also select an index of the array: document.getElementsByClassName('rhap_progress-indicator')[0]. 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.. The other problem is that you call setProducts in an async function. Thanks for your support.. :) document.getElementById("MyElement").className = "MyClass"; (You can use a space-delimited list to apply multiple classes.) Sorted by: Reset to default Highest score (default) Trending (recent votes count more) Date modified (newest first) Date created (oldest first) but setProducts is an async function, too. I think that is a possible reason. 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 Sorted by: Reset to default Highest score (default) Trending (recent votes count more) Date modified (newest first) Date created (oldest first) 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 await setProducts() And the last thing you have to do is checking response.data value. There is no button in the background unless it is programmatically generated first. Similarly in statically typed Java this won't compile: public Object foo() { return 42; } foo().signum(); From the docs, here is what it says with regards to Class.contextType:. I'm basing this 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 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). So document.getElementsByClassName('rhap_progress-indicator') needs to also select an index of the array: document.getElementsByClassName('rhap_progress-indicator')[0]. From the docs, here is what it says with regards to Class.contextType:. I think that is a possible reason. So, whenever you call document.getElementById again, after that, you're trying to execute a string, hence why you get not a function. 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. ; A worker (of any type) and a dedicated worker it created. 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. If there is only one such element, you could use the array indexer to retrieve the first one. The alternative is to use document.querySelector('.rhap_progress-indicator'), which returns the element if it exists. 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,. Using browser development tools see if you can call the function manually from the console. A Window object A and the Window object of an iframe element that A created that could be same origin-domain 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 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 you still get Function not defined then do the following: 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. 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"; Yes, man, actually, the 'main' bug that was bothering me was in call the "popularCombo" function. 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.. 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? let myDivs = document.getElementsByClass('myDiv'); let text=myDivs[2].innerText; // Uncaught TypeError: Cannot read property 'innerText' of undefined Compartir Mejora esta respuesta See more linked questions. 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"; Removing the callback function would do the trick (function() { //comment this out //your code })(); //comment this out Similarly in statically typed Java this won't compile: public Object foo() { return 42; } foo().signum(); From the docs, here is what it says with regards to Class.contextType:. I think that is a possible reason. 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) 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 . See that your function is not in a callback function if you are using an external js file. 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). 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:. 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. If there is only one such element, you could use the array indexer to retrieve the first one. 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. 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:. Is there a standard function to check for null, undefined, or blank variables in JavaScript? In my case, I use rails framework and require jQuery twice. See that your function is not in a callback function if you are using an external js file. getElementById will continue to return undefined after checking naming or waiting for content load. A Window object A and the Window object of an iframe element that A created that could be same origin-domain False. 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 Using browser development tools see if you can call the function manually from the console. html { scroll-behavior: smooth; } You can first check app/assets/application.js file. So, whenever you call document.getElementById again, after that, you're trying to execute a string, hence why you get not a function. document.getElementsByClassName returns an array. You can first check app/assets/application.js file. The other problem is that you call setProducts in an async function. Yes, man, actually, the 'main' bug that was bothering me was in call the "popularCombo" function. 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. 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 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. Try by putting it inside DOMContentLoaded event The alternative is to use document.querySelector('.rhap_progress-indicator'), which returns the element if it exists. The .select() method does indeed retrieve the text from a field. If you still get Function not defined then do the following: 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. ; A worker (of any type) and a dedicated worker it created. 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? React - uncaught TypeError: Cannot read property 'setState' of undefined 134 react router v^4.0.0 Uncaught TypeError: Cannot read property 'location' of undefined Put another way, your element does not exist. So document.getElementsByClassName('rhap_progress-indicator') needs to also select an index of the array: document.getElementsByClassName('rhap_progress-indicator')[0]. var myTable = document.getElementById("myTable"); var rowCount = myTable.rows.length; for (var x=rowCount-1; x>0; x--) { myTable.deleteRow(x); } You can first check app/assets/application.js file. export default function useLogOut() { const history = useHistory(); // we don't useEffect here, we are only interested in function function int() { var source = document.getElementById('j1_64_anchor').click; } is getting executed before the dom is ready. 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) let myDivs = document.getElementsByClass('myDiv'); let text=myDivs[2].innerText; // Uncaught TypeError: Cannot read property 'innerText' of undefined Compartir Mejora esta respuesta Thanks for your support.. :) The following worked for me. Neither of these has helped me fix the problem. The other problem is that you call setProducts in an async function. Put another way, your element does not exist. I'm basing this 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 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 So you have to add await before setProducts. Hey! function int() { var source = document.getElementById('j1_64_anchor').click; } is getting executed before the dom is ready. 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 428 React - uncaught TypeError: Cannot read property 'setState' of undefined Neither of these has helped me fix the problem. 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. 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,. 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. Is there a standard function to check for null, undefined, or blank variables in JavaScript? Using browser development tools see if you can call the function manually from the console. In my case, I use rails framework and require jQuery twice. Sorted by: Reset to default Highest score (default) Trending (recent votes count more) Date modified (newest first) Date created (oldest first) getElementById will continue to return undefined after checking naming or waiting for content load. That is the code, when I use FormData : var form_data = new FormData("#my-awesome-dropzone"); So I guess you want to change that to: So I guess you want to change that to: 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:. 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. A Window object and a dedicated worker that it created. A Window object A and the Window object of an iframe element that A created that could be same origin-domain document.getElementById("MyElement").className = "MyClass"; (You can use a space-delimited list to apply multiple classes.) 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. document.getElementsByClassName returns an array. 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 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. So I guess you want to change that to: So I guess you want to change that to: 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 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"; 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). 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 False. 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 ## 3 ways for binding this to the below function## Hey! 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 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 . 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 . 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. Neither of these has helped me fix the problem. but setProducts is an async function, too. Try by putting it inside DOMContentLoaded event 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 It thinks the variable username is null. 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. but setProducts is an async function, too. 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:. document.getElementsByClassName returns an array. 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 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.
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