写移动端项目时,总是会纠结是用css3 media query 还是用rem。移动端框架挺多,但是因为项目都比较小,不考虑使用。
无意在网上找到一个移动端rem布局的解决方案,经个人实践,目前未出现什么大问题,收藏备用。
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><title>移动端rem布局</title><meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0" /><style>.test{width: 1rem;height: 1rem;background-color: #fa5275;}</style></head><body><div class="test"></div><p>设置前html的fontsize:16px;</p><p>设置前html的fontsize:16px;</p><script>function adapt(designWidth, rem2px){var d = window.document.createElement('div');d.style.width = '1rem';d.style.display = "none";var head = window.document.getElementsByTagName('head')[0];head.appendChild(d);var defaultFontSize = parseFloat(window.getComputedStyle(d, null).getPropertyValue('width'));d.remove();document.documentElement.style.fontSize = window.innerWidth / designWidth * rem2px / defaultFontSize * 100 + '%';var st = document.createElement('style');var portrait = "@media screen and (min-width: "+window.innerWidth+"px) {html{font-size:"+ ((window.innerWidth/(designWidth/rem2px)/defaultFontSize)*100) +"%;}}";var landscape = "@media screen and (min-width: "+window.innerHeight+"px) {html{font-size:"+ ((window.innerHeight/(designWidth/rem2px)/defaultFontSize)*100) +"%;}}" st.innerHTML = portrait + landscape;head.appendChild(st);return defaultFontSize;}var defaultFontSize = adapt(640, 100);</script></body></html>
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