無法獲得的childNodes computedStyle

Question

無法獲得的childNodes computedStyle，得到一個錯誤：

Uncaught TypeError: Failed to execute 'getComputedStyle' on 'Window': parameter 1 is not of type 'Element'

let wrappers = document.querySelectorAll('[data-attribute="wrapper"]'); 
    wrappers = Array.prototype.slice.call(wrappers); 

    wrappers.forEach((el) => { 
    let wrappersChildren = wrappers.slice.call(el.childNodes, 0); 

    wrappersChildren.forEach((el) => { 
     const childrenWidth = window.getComputedStyle(el).width; 
     ... 

如果我沒有搞錯？

Answer 1

let wrappers = document.querySelectorAll('[data-attribute="wrapper"]'); 
    wrappers = Array.prototype.slice.call(wrappers); 

    wrappers.forEach((el) => { 
    //Using el.childNodes is the mistake... returns text nodes too. 
    //change to el.children 
    let wrappersChildren = wrappers.slice.call(el.children, 0); 

    wrappersChildren.forEach((el) => { 
     const childrenWidth = window.getComputedStyle(el).width; 
     ...