Discuss / JavaScript / document.getElementsByClassName(red)总是返回一组DOM节点,返回其内部所有class包含red的节点

document.getElementsByClassName(red)总是返回一组DOM节点,返回其内部所有class包含red的节点

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// 选择<p>JavaScript</p>: var js = document.getElementById('test-p'); console.log(js) // 选择<p>Python</p>,<p>Ruby</p>,<p>Swift</p>: var arr = document.getElementsByClassName('c-red c-green')[0].children; console.log(arr) // 选择<p>Haskell</p>: var haskell = document.getElementsByClassName('c-green')[1].lastElementChild; console.log(haskell)


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