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Large amount of classes locks up getCombinations

See original GitHub issue

I’m seeing an issue where a website with a large amount of classes on the <html> element causes the getCombinations to lock up on the following code:

for (i = k = 0, ref = items.length - 1; 0 <= ref ? k <= ref : k >= ref; i = 0 <= ref ? ++k : --k) {
  for (j = l = 0, ref1 = result.length - 1; 0 <= ref1 ? l <= ref1 : l >= ref1; j = 0 <= ref1 ? ++l : --l) {
    result.push(result[j].concat(items[i]));
  }
}

In my case, I have 47 classes that are returned by getAllSelectors, which I assume are generated by the UI libraries running on the website.

Issue Analytics

State:
Created 7 years ago
Reactions:2
Comments:5 (2 by maintainers)

Top GitHub Comments

1reaction

vishaltelangrecommented, May 31, 2016

My browser was also running out of memory when I tried to grab the selectors on nytimes website.

Until this is fixed, I am getting rid of the classes added on HTML tag with the following condition:

// ...
CssSelectorGenerator.prototype.getClassSelectors = function(element) {
      var class_string, item, result;
      result = [];

      if (element.tagName === 'HTML') {
        return result;
      }

     // ...

0reactions

fczbkkcommented, Aug 21, 2021

I have added maxCombinations and maxCandidates performance options. These should help to deal with the sites that, for example, use large number of classnames on elements.

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