2021-10-04 09:31:51 -04:00
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<!DOCTYPE html>
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<html>
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<body>
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<h2 class="example">A heading with class="example"</h2>
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<p class="example">A paragraph with class="example".</p>
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<p>Click the button to add a background color all elements with class="example".</p>
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<button onclick="myFunction()">Try it</button>
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2021-10-14 08:09:56 -04:00
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<button onclick="myFunction2()">Empty list</button>
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2021-10-04 09:31:51 -04:00
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<p><strong>Note:</strong> The querySelectorAll() method is not supported in Internet Explorer 8 and earlier versions.</p>
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<script>
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function myFunction() {
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var x, i;
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x = document.querySelectorAll(".example");
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for (i = 0; i < x.length; i++) {
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2021-11-10 12:05:35 -05:00
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window.alert(i + ' ' + x[i].outerHTML);
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2021-10-04 09:31:51 -04:00
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}
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}
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2021-10-14 08:09:56 -04:00
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function myFunction2() {
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x = document.querySelectorAll(".example6");
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2021-11-10 12:05:35 -05:00
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window.alert(x.length);
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2021-10-14 08:09:56 -04:00
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}
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2021-10-04 09:31:51 -04:00
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</script>
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</body>
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</html>
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