CODEWITHSUNDEEP
javascriptanchorgreasemonkey
nullDev
nullDev

Reputation: 11597

How to simulate click on anchor with specific text using javascript in GreaseMonkey?

Suppose I load a webpage which contains the following anchor:

<a class="someClass" href="#" onClick="gotoPage('http://somepage.org')">Link</a>

What I want is: as soon as the page is loaded, I want to generate onClick for this anchor which has text as "Link".

Note that the anchor does not contains any id or name associated with it. Thus document.getelementbyid or document.getelementbyname will not work.

Upvotes: 1

Views: 3717

Answers (3)

neu242
neu242

Reputation: 16575

The solution (which Tomalak linked to) from https://developer.mozilla.org/en/DOM/event.initMouseEvent worked great for me, and it doesn't require prototype or jquery.

function simulateClick() {
  var evt = document.createEvent("MouseEvents");
  evt.initMouseEvent("click", true, true, window,
    0, 0, 0, 0, 0, false, false, false, false, 0, null);
  var cb = document.getElementById("checkbox"); 
  var canceled = !cb.dispatchEvent(evt);
  if(canceled) {
    // A handler called preventDefault
    alert("canceled");
  } else {
    // None of the handlers called preventDefault
    alert("not canceled");
  }
}

Upvotes: 1

Ian Oxley
Ian Oxley

Reputation: 11056

As you're using Greasemonkey you should be able to use XPath to select the link in question using one of it's HTML attributes:

http://diveintogreasemonkey.org/patterns/match-attribute.html

Upvotes: 2

Tomalak
Tomalak

Reputation: 338208

Here is what people seem to do to be able to generically trigger a click event in Firefox. They extend the HTMLAnchorElement prototype with a click() function, like so:

HTMLAnchorElement.prototype.click = function() {
  var evt = this.ownerDocument.createEvent('MouseEvents');
  evt.initMouseEvent('click', true, true, this.ownerDocument.defaultView, 1, 0, 0, 0, 0, false, false, false, false, 0, null);
  this.dispatchEvent(evt);
}

See MDC for initMouseEvent().

If you have jQuery, you might also check out trigger().

Upvotes: 3

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