'use strict';

export const setRem = () => {
	//  PC端
	// 基准大小
	let baseSize = 100;
	let basePc = baseSize / 1920; // 表示1920的设计图,使用100PX的默认值
	let vW = window.innerWidth; // 当前窗口的宽度
	let vH = window.innerHeight; // 当前窗口的高度
	// 非正常屏幕下的尺寸换算
	let dueH = (vW * 1080) / 1920;
	if (vH < dueH) {
		// 当前屏幕高度小于应有的屏幕高度，就需要根据当前屏幕高度重新计算屏幕宽度
		vW = (vH * 1920) / 1080;
	}
	let rem = vW * basePc; // 以默认比例值乘以当前窗口宽度,得到该宽度下的相应font-size值
	document.documentElement.style.fontSize = rem + 'px';

	// 改变窗口大小时重新设置 rem
	window.onresize = function () {
		setRem();
	};
}

export const loadScript = (url: string, callback: any) => {

	var script = document.createElement("script");

	script.type = "text/javascript";

	if (typeof (callback) != "undefined") {
		
		console.log((script as any).readyState)
		if ((script as any).readyState) {
			(script as any).onreadystatechange = function () {
				if ((script as any).readyState == "loaded" || (script as any).readyState == "complete") {
					(script as any).onreadystatechange = null;
					callback();
				}
			};

		} else {
			script.onload = function () {
				callback();
			};
		}
	};
	script.src = url;
	document.body.appendChild(script);
}