javascript 加载脚本标签（javascript）

Posted 2021-05-03

function load_script(id, url) {
	var s = document.createElement("script");
	s.src = url;
	s.type = 'text/javascript';
	s.id = id;
	s.defer = "defer";
	
	var el = document.getElementById(id);
	if (!el) {
		var head = document.querySelector("head");
		head.appendChild(s);
		console.log("[load_script] js["+url+"]");
	} else {
		console.log("[load_script] js["+url+"] already exists");
	}
}

function load_stylesheet(id, url) {
	var s = document.createElement("link");
	s.rel = 'stylesheet prefetch';
	s.href = url;
	s.type = 'text/css';
	s.id = id;
	//s.media = 'all';
	
	var el = document.getElementById(id);
	if (!el) {
		var head = document.querySelector("head");
		head.appendChild(s);
		console.log("[load_stylesheet] css["+url+"]");
	} else {
		console.log("[load_stylesheet] css["+url+"] already exists");
	}
}