哪個(gè)性能更好？如果語(yǔ)句更具可讀性，但是如果我在數(shù)組（數(shù)據(jù)庫(kù)式）中創(chuàng)建值并讓我的 for 循環(huán)根據(jù)當(dāng)前索引調(diào)用函數(shù)，這使得進(jìn)一步編輯變得更容易。var msg = [ "You are now viewing Tab number one", "You are now viewing Tab number two", "You are now viewing Tab number three", "You are now viewing Tab number four"]var button = document.getElementsByTagName("button")for (var i = 0, len = button.length; i < len; ++i) { (function(index) { button[i].addEventListener("click", function() { document.getElementById("msg").innerHTML = msg[index]; }); })(i);}<button>Tab1</button><button>Tab2</button><button>Tab3</button><button>Tab4</button><br><p id="msg">Message here</p>var button = document.getElementsByTagName("button")for (var i = 0, len = button.length; i < len; ++i) { (function(index) { button[i].addEventListener("click", function() { if (index==0){ document.getElementById("msg").innerHTML = "You are now viewing Tab number one"; } if (index==1) { document.getElementById("msg").innerHTML = "You are now viewing Tab number two"; } if (index==2) { document.getElementById("msg").innerHTML = "You are now viewing Tab number three"; } if (index==3) { document.getElementById("msg").innerHTML = "You are now viewing Tab number four"; } }); })(i);}<button>Tab1</button><button>Tab2</button><button>Tab3</button><button>Tab4</button><br><p id="msg">Message here</p>
Array vs If 在索引 for 循環(huán)中的性能？
浮云間
2022-10-13 14:29:53
