教你用js截取字符串开头、结尾及两字符串之间的内容

    let str = "Hello word!";
    str.substr(0, 5); //Hello  

    let str = "Hello word!";
    console.log(str.substring(2, 4)); //ll

     var str = "Hello happy world!";
     str.slice(6, 11); //happy

var str = "hello world!hello man!how are you!";
var arr = str.split();
console.log(arr)
 
//["hello world!hello man!how are you!"]

    var str = "hello word!";
    str = str.match(/h(\S*)!/)[1];
    alert(str); ello wor

    var str = "aaafff";
    str = str.match(/(\S*)fff/)[1];
    alert(str); //aaa

    var str = "aaafff";
    str = str.match(/aaa(\S*)/)[1];
    alert(str); //fff

congsole.log(n)
const spliceLength2 = n.lastIndexOf("/");
this.pathType = n.slice(spliceLength2 + 1);
congsole.log(this.pathType)