jquery wait for element to exist

1var checkExist = setInterval(function() {
2   if ($('#the-canvas').length) {
3      console.log("Exists!");
4      clearInterval(checkExist);
5   }
6}, 100); // check every 100ms
7

1
2//https://gist.github.com/chrisjhoughton/7890303
3
4var waitForEl = function(selector, callback) {
5  if (jQuery(selector).length) {
6    callback();
7  } else {
8    setTimeout(function() {
9      waitForEl(selector, callback);
10    }, 100);
11  }
12};
13
14waitForEl(selector, function() {
15  // work the magic
16});
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