Get elements by attribute when querySelectorAll is not available without using libraries

Question

lt p data-foo  bar  gt    How can you do the equivalent to  document querySelectorAll   data-foo      where querySelectorAll is not available    I need a native solution that works at least in IE7  I don   t care about IE6

User · Answer

That works too   document querySelector  attribute  value       So   document querySelector  data-foo  bar

User · Answer

Try this it works  document querySelector   attribute  value      example    document querySelector   role  button

User · Answer

Don t use in Browser  In the browser  use document querySelect   attribute-name      But if you re unit testing and your mocked dom has a flakey querySelector implementation  this will do the trick     This is  kevinfahy s answer  just trimmed down to be a bit with ES6 fat arrow functions and by converting the HtmlCollection into an array at the cost of readability perhaps    So it ll only work with an ES6 transpiler  Also  I m not sure how performant it ll be with a lot of elements    function getElementsWithAttribute attribute      return    slice call document getElementsByTagName            filter elem   gt  elem getAttribute attribute      null       And here s a variant that will get an attribute with a specific value  function getElementsWithAttributeValue attribute  value      return    slice call document getElementsByTagName            filter elem   gt  elem getAttribute attribute      value

User · Answer

You could write a function that runs getElementsByTagName       and returns only those elements with a  data-foo  attribute   function getAllElementsWithAttribute attribute      var matchingElements         var allElements   document getElementsByTagName         for  var i   0  n   allElements length  i  lt  n  i            if  allElements i  getAttribute attribute      null                 Element exists with attribute  Add to array        matchingElements push allElements i                return matchingElements      Then   getAllElementsWithAttribute  data-foo

User · Answer

Try this - I slightly changed the above answers   var getAttributes   function attribute        var allElements   document getElementsByTagName               allElementsLen   allElements length          curElement          i          results            for i   0  i  lt  allElementsLen  i    1            curElement   allElements i            if curElement getAttribute attribute                 results push curElement                        return results       Then   getAttributes  data-foo

User · Answer

A little modification on  kevinfahy  s answer  to allow getting the attribute by value if needed   function getElementsByAttributeValue attribute  value     var matchingElements         var allElements   document getElementsByTagName         for  var i   0  n   allElements length  i  lt  n  i          if  allElements i  getAttribute attribute      null          if   value    allElements i  getAttribute attribute     value          matchingElements push allElements i                return matchingElements

User · Answer

Use     find first element with  someAttr  attribute document querySelector   someAttr      or    find all elements with  someAttr  attribute document querySelectorAll   someAttr       to find elements by attribute  It s now supported in all relevant browsers  even IE8   http   caniuse com  search queryselector

User · Answer

I played a bit around and ended up with this crude solution   function getElementsByAttribute attribute  context      var nodeList    context    document  getElementsByTagName         var nodeArray         var iterator   0    var node   null     while  node   nodeList iterator           if  node hasAttribute attribute   nodeArray push node          return nodeArray      The usage is quite simple  and works even in IE8   getElementsByAttribute  data-foo       or with parentNode getElementsByAttribute  data-foo   document     http   fiddle jshell net 9xaxf6jr   But I recommend to use querySelector   All for this  and to support older browsers use a polyfill    document querySelectorAll   data-foo

[javascript] Get elements by attribute when querySelectorAll is not available without using libraries?

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