Development error: 200parsererror SyntaxError: syntax error, unable to load--

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this error is only reported by ie browsers
: development error: 200parsererror SyntaxError: syntax error, unable to load--
other browsers have no problem. I use ie11 headers and I don"t know how to solve it.

Javascript internet-explorer ie-is-compatible-with ie11

Dec.16,2021

clarifies one line of code comments and finds that ie does not support arr.every and arrow functions.

use babel to transfer ES6 code to ES5 code
https://www.babeljs.cn/repl/

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