How to determine whether an array is empty in es6

es6 Method to determine whether the array is empty: 1. Use the "arr.length == 0" statement to determine whether the length of the array is 0. If it is 0, it is empty; 2. Use "JSON.stringify" (arr) === '[]'" statement, if the return value is false, it will be empty.

The operating environment of this tutorial: Windows 7 system, ECMAScript version 6, Dell G3 computer.

es6 method to determine whether the array is empty

Method 1: Use the length attribute

let arr = [];
if (arr.length == 0){
   console.log("数组为空")
}else {
   console.log("数组不为空")
}

Method 2: Using JSON.stringify()

let arr = [1,2,3];
if (JSON.stringify(arr) === '[]'){
   console.log("数组为空")
}else {
   console.log("数组不为空")
}

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