常见的JS字符串属性与方法集锦

var txt = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
const string = txt.length;
// string = 26;

var str = "How old are you?";
var res = str.slice(5,14);
// res = ld are yo;

var str = "How old are you?";
var res = str.slice(6,13);
// res = d are y;

var str = "How old are you?";
var res = str.split('o');
// res = H,w ,ld are y,u?;

var str = "The full name of the United States is the United States of America.";
var pos = str.indexOf("United");
// pos = 21;

var str = "The full name of the United States is the United States of America.";
var pos = str.lastIndexOf("United");
// pos = 42;

var str = "The full name of the United States is the United States of America.";
var pos = str.charAt("10");
// pos = a;