html代碼：js代碼：function countBodyChildren(){ var body_element=document.getElementsByTagName("body")[0]; alert(body_element.chilNodes.length);}window.onload=countBodyChildren;console中報(bào)錯(cuò)：test44.js:9 Uncaught TypeError: Cannot read property 'length' of undefined at countBodyChildren (test44.js:9)countBodyChildren @ test44.js:9
js 中object.childNodes.length undefined是什么原因呢？
有只小跳蛙
2019-02-13 15:19:33
