Il suffit d'utiliser cliquer . Pour des déclenchements d'événements plus avancés, utilisez dispatchEvent .
const body = document.body;
body.addEventListener('click', e => {
console.log('clicked body');
});
console.log('Using click()');
body.click();
console.log('Using dispatchEvent');
body.dispatchEvent(new Event('click'));
Réponse originale - Obsolète
Voici ce que j'utilise pour IE9+ http://jsfiddle.net/mendesjuan/rHMCy/4/
/**
* Fire an event handler to the specified node. Event handlers can detect that the event was fired programatically
* by testing for a 'synthetic=true' property on the event object
* @param {HTMLNode} node The node to fire the event handler on.
* @param {String} eventName The name of the event without the "on" (e.g., "focus")
*/
function fireEvent(node, eventName) {
// Make sure we use the ownerDocument from the provided node to avoid cross-window problems
var doc;
if (node.ownerDocument) {
doc = node.ownerDocument;
} else if (node.nodeType == 9){
// the node may be the document itself, nodeType 9 = DOCUMENT_NODE
doc = node;
} else {
throw new Error("Invalid node passed to fireEvent: " + node.id);
}
if (node.dispatchEvent) {
// Gecko-style approach (now the standard) takes more work
var eventClass = "";
// Different events have different event classes.
// If this switch statement can't map an eventName to an eventClass,
// the event firing is going to fail.
switch (eventName) {
case "click": // Dispatching of 'click' appears to not work correctly in Safari. Use 'mousedown' or 'mouseup' instead.
case "mousedown":
case "mouseup":
eventClass = "MouseEvents";
break;
case "focus":
case "change":
case "blur":
case "select":
eventClass = "HTMLEvents";
break;
default:
throw "fireEvent: Couldn't find an event class for event '" + eventName + "'.";
break;
}
var event = doc.createEvent(eventClass);
event.initEvent(eventName, true, true); // All events created as bubbling and cancelable.
event.synthetic = true; // allow detection of synthetic events
// The second parameter says go ahead with the default action
node.dispatchEvent(event, true);
} else if (node.fireEvent) {
// IE-old school style, you can drop this if you don't need to support IE8 and lower
var event = doc.createEventObject();
event.synthetic = true; // allow detection of synthetic events
node.fireEvent("on" + eventName, event);
}
};
Il convient de noter que l'appel à fireEvent(inputField, 'change');
ne signifie pas qu'il modifiera effectivement le champ de saisie. Le cas typique d'utilisation d'un événement de modification est lorsque vous définissez un champ par programme et que vous souhaitez que les gestionnaires d'événements soient appelés depuis l'appel de la commande input.value="Something"
ne déclenchera pas d'événement de changement.