react-app-shell
Version:
react打包脚本和example, 这里的版本请忽略
35 lines (30 loc) • 1.03 kB
JavaScript
(function flexible(window, document) {
let docEl = document.documentElement;
let dpr = window.devicePixelRatio || 1;
// set 1rem = viewWidth / 10
function setRemUnit() {
let cw = docEl.clientWidth > 750 ? 750 : docEl.clientWidth;
let rem = cw / 10;
docEl.style.fontSize = rem + 'px';
}
setRemUnit();
// reset rem unit on page resize
window.addEventListener('resize', setRemUnit);
window.addEventListener('pageshow', function (e) {
if (e.persisted) {
setRemUnit();
}
});
// detect 0.5px supports
if (dpr >= 2) {
let fakeBody = document.createElement('body');
let testElement = document.createElement('div');
testElement.style.border = '.5px solid transparent';
fakeBody.appendChild(testElement);
docEl.appendChild(fakeBody);
if (testElement.offsetHeight === 1) {
docEl.classList.add('hairlines');
}
docEl.removeChild(fakeBody);
}
})(window, document);