如題，代碼中三元運(yùn)算符改寫成if else則可以，為甚么？<!DOCTYPE html><html xmlns="http://www.w3.org/1999/xhtml"><head><title>用鼠標(biāo)滾輪滾動(dòng)控制圖片的縮小放大</title><script language="javascript">function bbimg(o){ var zoom=parseInt(o.style.zoom, 10)||100; zoom+=event.wheelDelta/12; zoom < 50 ? 50 : (zoom > 200 ? 200 : zoom); //目標(biāo) console.log(zoom); o.style.zoom=zoom+'%'; return false;}</script></head><body><p>將鼠標(biāo)放在圖片上，點(diǎn)擊一下，然后滾動(dòng)鼠標(biāo)滾輪試試看</p><p><img border="0" src="/images/pulpit.jpg" onmousewheel="return bbimg(this)"></p></body></html>
javascript中三元運(yùn)算符失效
青春有我
2018-12-12 18:15:29
