Function hasClass

libs/htmlwidgets-1.5.3/htmlwidgets.js:135–138

(el, className)

  }

  function hasClass(el, className) {
    var re = new RegExp("\\b" + escapeRegExp(className) + "\\b");
    return re.test(el.className);
  }

  // elements - array (or array-like object) of HTML elements
  // className - class name to test for