js 中object.childNodes.length undefined是什么原因呢？

Question

html代码：js代码：function countBodyChildren(){    var body_element=document.getElementsByTagName("body")[0];    alert(body_element.chilNodes.length);}window.onload=countBodyChildren;console中报错：test44.js:9 Uncaught TypeError: Cannot read property 'length' of undefined    at countBodyChildren (test44.js:9)countBodyChildren @ test44.js:9

Answer 1

书写错误吧，是childNodes不是chilNodes

function countBodyChildren(){

    var body_element=document.getElementsByTagName("body")[0];

    alert(body_element.childNodes.length);

}

window.onload=countBodyChildren;