Javascript鍙互鍋氬緢澶氫护浜烘儕濂囩殑浜嬫儏锛岃€屼笖鏈夊緢澶氫笢瑗块渶瑕佸涔狅紝浠婂ぉ鎴戜滑浠嬬粛鍑犱釜绠€鐭€屾暣娲佺殑浠ｇ爜鐗囨銆傚緱鍒颁竴涓殢鏈虹殑甯冨皵鍊?True/False)浣跨敤Math.random()杩斿洖涓€涓?鍒?鐨勯殢鏈烘暟锛岀劧鍚庡垽鏂槸鍚﹀ぇ浜?.5锛屼綘浼氬緱鍒颁竴涓湁50%姒傜巼涓篢rue鎴朏alse鐨勫€糲onstrandomBoolean=()=>Math.random()>=0.5;console.log(randomBoolean());纭畾鏃ユ湡鏄惁涓哄伐浣滄棩纭畾缁欏畾鏃ユ湡鏄惁涓哄伐浣滄棩constisWeekday=(date)=>date.getDay()%6!==0;console.log(isWeekday(newDate(2021,0,11)));//Result:true(Monday)console.log(isWeekday(newDate(2021,0,10)));//Result:false(Sunday)鍙嶈浆瀛楃涓茬殑鏂规硶鏈夊緢澶氱锛岃繖閲屼粙缁嶆渶绠€鍗曠殑涓€绉嶏紝浣跨敤split()銆乺everse()鍜宩oin()constreverse=str=>str銆俿plit('').reverse().join('');reverse('浣犲ソ涓栫晫');//缁撴灉锛?dlrowolleh'鍒ゆ柇褰撳墠閫夐」鍗℃槸鍚﹀彲瑙併€傛祻瑙堝櫒鍙互鎵撳紑寰堝鏍囩椤碉紝濡備笅馃憞馃徎浠ｇ爜娈垫槸鍒ゆ柇褰撳墠鏍囩椤垫槸鍚︽槸娲诲姩鏍囩椤礳onstisBrowserTabInView=()=>document.hidden;isBrowserTabInView();鍒ゆ柇鏁版槸濂囨暟杩樻槸鍋舵暟鍙栨ā杩愮畻绗?鍙互寰堝ソ鐨勫畬鎴愯繖涓换鍔onstisEven=num=>num%2===0;console.log(isEven(2));//Result:trueconsole.log(isEven(3));//缁撴灉锛歠alse浠嶥ate瀵硅薄涓幏鍙栨椂闂翠娇鐢―ate瀵硅薄鐨?toTimeString()鏂规硶杞崲涓烘椂闂村瓧绗︿覆锛岀劧鍚庡彲浠ユ埅鍙栬瀛楃涓瞔onsttimeFromDate=date=>date.toTimeString().slice(0,8);console.log(timeFromDate(鏂版棩鏈?2021,0,10,17,30,0)));//Result:"17:30:00"console.log(timeFromDate(newDate()));//Result:杩斿洖鎸囧畾灏忔暟浣嶇殑褰撳墠鏃堕棿consttoFixed=(n,fixed)=>~~(Math.pow(10,fixed)*n)/Math.pow(10,fixed);//ExamplestoFixed(25.198726354,1);//25.1toFixed(25.198726354,2);//25.19toFixed(25.198726354,3);//25.198toFixed(25.198726354,4);//25.1987toFixed(25.198726354,5);//25.19872toFixed(25.198726354,6);//25.198726妫€鏌ユ寚瀹氬厓绱犳槸鍚﹀浜庤仛鐒︾姸鎬併€傚彲浠ラ€氳繃document.activeElement鍒ゆ柇鍏冪礌鏄惁澶勪簬鑱氱劍鐘舵€乧onstelementIsInFocus=(el)=>(el===document.activeElement);elementIsInFocus(anyElement)//缁撴灉锛氬鏋滃浜庣劍鐐瑰垯杩斿洖True锛屽惁鍒欒繑鍥濬alse妫€鏌ュ綋鍓嶇敤鎴锋槸鍚︽敮鎸佽Е鎽镐簨浠禼onsttouchSupported=()=>{('ontouchstart'inwindow||window.DocumentTouch&&documentinstanceofwindow.DocumentTouch);}console.log(touchSupported());//缁撴灉锛氬鏋滄敮鎸佽Е鎽镐簨浠讹紝鍒欒繑鍥濼rue锛屽惁鍒欒繑鍥濬alse锛屽垽鏂綋鍓嶇敤鎴锋槸鍚︿负鑻规灉璁惧銆傛偍鍙互浣跨敤navigator.platform鏉ュ垽鏂綋鍓嶇敤鎴锋槸鍚︿负鑻规灉璁惧銆俢onstisAppleDevice=/Mac|iPod|iPhone|iPad/.test(navigator.platform);console.log(isAppleDevice);//缁撴灉锛氬鏋滄槸鑻规灉璁惧锛屽垯杩斿洖True锛屾粴鍔ㄥ埌椤甸潰绐楀彛椤堕儴.scrollTo()浼氭粴鍔ㄥ埌鎸囧畾鐨勫潗鏍囷紝濡傛灉鍧愭爣璁剧疆涓?0,0)锛屼細鍥炲埌椤甸潰椤堕儴constgoToTop=()=>window.scrollTo(0,0);goToTop();//缁撴灉锛氬皢婊氬姩鍒伴《閮ㄤ互鑾峰彇鎵€鏈夊弬鏁版墍鏈夊弬鏁扮殑骞冲潎鍊煎彲浠ヤ娇鐢╮educe()鍑芥暟璁＄畻constaverage=(...args)=>args.reduce((a,b)=>a+b)/args.length;average(1,2,3,4);//Result:2.5杞崲鍗庢皬/鎽勬皬涓嶅啀瀹虫€曞鐞嗘俯搴﹀崟浣嶏紝涓嬮潰涓や釜鍑芥暟鏄袱涓俯搴︾殑鐩镐簰杞崲鍗曚綅constcelsiusToFahrenheit=(celsius)=>celsius*9/5+32;constfahrenheitToCelsius=(fahrenheit)=>(fahrenheit-32)*5/9;//ExamplescelsiusToFahrenheit(15);//59鎽勬皬搴﹀埌鍗庢皬搴︼紙0锛夛紱//32鎽勬皬搴﹀埌鍗庢皬搴︼紙-20锛夛紱//-4鍗庢皬搴﹁嚦鎽勬皬搴?59);//15鍗庢皬搴﹀埌鎽勬皬搴?32);//0鎰熻阿闃呰锛屽笇鏈涗綘鏈夋墍鏀惰幏馃槃
