I would like to trigger a click event on a HTML element in Typescript/Reactjs.
let element: Element = document.getElementsByClassName('btn')[0];
element.click();
The code above does work. But I'm getting a Typescript error:
ERROR in [at-loader] ./src/App.tsx:124:17
TS2339: Property 'click' does not exist on type 'Element'.
So what would be the correct way to do this?
Use the type HTMLElement instead of Element. HTMLElement inherits from Element. And in the documentation you can find that click function is defined in the HTMLElement.
Cast your element into the HTMLElement via
let element: HTMLElement = document.getElementsByClassName('btn')[0] as HTMLElement;
element.click();
HTMLButtonElement if you know it's a <button/>
document.getElementsByClassName('btn')[0] as HTMLElementCorrect (type safe) way is:
if (element instanceof HTMLElement) {
element.click();
}
You shouldn't use forced casts (as suggested by other answers) unless you really need them.
document
.querySelectorAll<HTMLElement>('.ant-table-row-expand-icon')
.forEach(node => node.click())
You should use ref to access DOM.
<button ref={button => this.buttonElement = button} />
In your event handler:
this.buttonElement.click();// trigger click event
Or,Create HtmlEvents and attach to dom element.
var event = document.createEvent("HTMLEvents");
event.initEvent("click", true, true);
var button = document.getElementsByClassName('btn')[0];
button.dispatchEvent(event);
Use Like this
(<HTMLElement>document.getElementsByClassName('btn')[0]).click()
Modern syntax:
document.querySelector<HTMLElement>('.btn')?.click()
had a similar issue while scripting using Puppeteer , the following helped to resolve the type: srcTracker:HTMLElement
page.$eval(this.selectorElement,(srcTracker:HTMLElement) => srcTracker.click());
as mentioned here, also
var buttons = document.getElementsByClassName(
"btn"
) as HTMLCollectionOf<HTMLElement>;
