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Pure JS, get element by class but not class

var items = document.getElementsByClassName("classname");

给我所有.classname类,如何更新代码以获取所有这些类,但不包括.classname_exclude

与其使用.getElementsByClassName() 方法, .querySelectorAll()使用.querySelectorAll()方法.querySelectorAll()接受CSS3选择器),并使用:not()伪类对那些元素取反:

var items = document.querySelectorAll('.classname:not(.classname_exclude)');

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