toUpperCase; //转化为大写node
toLowerCase; //转化为小写数组
split //分割字符串成数组 str.split(''); str.split(); 1,第一个为替换字符 2，显示个数dom
数组截断：element
var array = [1,2,3,4,5,6];
console.log(array.slice(-1)); // [6]
console.log(array.slice(-2)); // [5,6]
console.log(array.slice(-3)); // [4,5,6] 字符串
合并数组it
| 2io 3console |
var array1 = [1,2,3];table var array2 = [4,5,6];function console.log(array1.concat(array2)); |
将nodelist经过[].slice.call(elements)转化为数组
| 2 3 |
var elements = document.querySelectorAll("p"); // NodeList var arrayElements = [].slice.call(elements); // Now the NodeList is an array var arrayElements = Array.from(elements); |
数组重组
| 2 |
var list = [1,2,3]; console.log(list.sort(function() { Math.random() - 0.5 })); |
数组合并
var list = [1,2,3]; var add=[5,6,7]; var arr=[]; document.write(arr.concat(list,add));