屏幕分辨率适配

<script>
import _ from "lodash";
export default {
name: "App",
mounted() {
this.$nextTick(() => {
const $app = this.$refs.app;
// 设置 屏幕 百分比 尺寸 适配
const standardScale = "100%" / "100%";

window.addEventListener(
"resize",
_.debounce(function () {
const docHeight = document.body.clientHeight;
const docWidth = document.body.clientWidth;

if (docWidth < 1680) {
const currentScale = docHeight / docWidth;
let [scale, translate] = [0, 0];
if (currentScale < standardScale) {
// 以高度计算
scale = docHeight / 1080;
const shouleWidth = 1920 * scale;

const offsetWidth = docWidth - shouleWidth;
translate =
offsetWidth > 0 ? `translate(${offsetWidth / 2}px, 0)` : "";
} else {
// 以宽度计算
scale = docWidth / 1920;
const shouleHeight = 1080 * scale;
const offsetHeight = docHeight - shouleHeight;
translate =
offsetHeight > 0 ? `translate(0, ${offsetHeight / 2}px)` : "";
}
console.log(translate);
$app.style.cssText = `
transform: scale(${scale}) ${translate};
transform-origin: top left;
min-width: 1920px;
min-height: 1080px;
`;
} else {
$app.style.cssText = "";
}
}),
300
);

if (document.createEvent) {
var event = document.createEvent("HTMLEvents");
event.initEvent("resize", true, true);
window.dispatchEvent(event);
} else if (document.createEventObject) {
window.fireEvent("onresize");
}
});
},
};