includes() :
判断字符串中是否包含指定的字串(有的话返回true,否则返回false)
参数一:匹配的字串;参数二:从第几个开始匹配
console.log('hello world'.includes('world'));
console.log('hello world'.includes('world',7));
startsWith() :
判断字符串是否以特定的字串开始
let url = 'admin/index.php';
console.log(url.startsWith('aadmin'));
endsWith() :
判断字符串是否以特定的字串结束
let url = 'admin/index.php';
console.log(url.endsWith('phph'));
模板字符串:
模板字符串之前的一般做法:
let obj = {
username : 'lisi',
age : '12',
gender : 'male'
}
let tag = '<div><span>'+obj.username+'</span><span>'+obj.age+'</span><span>'+obj.gender+'</span></div>';
console.log(tag);
模板字符串做法(反引号表示模板,模板中的内容可以有格式,通过${}方式填充数据):
let obj = {
username : 'lisi',
age : '12',
gender : 'male'
}
let fn = function(info){
return info;
}
let tpl = `
<div>
<span>${obj.username}</span>
<span>${obj.age}</span>
<span>${obj.gender}</span>
<span>${1+1}</span>
<span>${fn('nihao')}</span>
</div>
`;
console.log(tpl);