原生javascript制作验证码

function sjyz() {
	let s = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
	let str = "";
	for (let i = 0; i < 4; i++) {
		let num = parseInt(Math.random() * s.length);
		// console.log()
		str += s.charAt(num);
	}
	$("#sjyz").html(str);
};



// 初始加载验证码
	sjyz();
// 点击刷新验证码
$("#sjyz").click(function(){
	sjyz();
})

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转载自blog.csdn.net/mlonly/article/details/86011099
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