Abominable ie8 prompts that the id is missing and is undefined_javascript tips

Recently I have been programming in javascript, using json, and wrote an array [{'id':'key_01','name':'university'},{'id':'key_02','name':'direct card' },{'id':'key_03','name':'new'},{'id':'key_04','name':'Change'},{'id':'key_05','name ':'M-Zone Card Set'},{'id':'key_06','name':'Inventory'},{'id':'key_07','name':'Fetion'},{'id': 'key_08','name':'Mobile Video'},{'id':'key_09','name':'School Communication'},];

Add to select in a loop on the page , but in IE8, it always prompts that the missing id is undefined, and it is ok in other browsers. Later, I used IE8's js debugging and found that the length of his array is 1 larger than the length of the array in other browsers, but the actual view The array does not have that many values. Later, when I looked carefully, I found that there was an extra comma at the end of the array. Just remove the comma.

It turns out that IE8 has a different method for obtaining the actual value and length. You cannot add extra commas at the end of the array.