[英]Cannot get the border-bottom width of an element using pure JavaScript
[英]Changing navbar border-bottom on scroll using Javascript
我試圖讓我的導航欄的邊框底部僅在我向下滾動后才出現,但到目前為止無法使其工作。
這是我正在使用的 JS:
$(document).ready(function(){ $(window).on("scroll",function(){ var wn = $(window).scrollTop(); if(wn > 100){ $(".semplice-navbar").css("border-bottom-color:","rgba(0,0,0,1)"); } else{ $(".semplice-navbar").css("border-bottom-color:","rgba(0,0,0,0)"); }
嘗試在 css 方法中調用元素時刪除“:”,如下面的代碼所示
$(document).ready(function(){
$(window).on("scroll",function(){
var wn = $(window).scrollTop();
if(wn > 100){
$(".semplice-navbar").css("border-bottom-color","rgba(0,0,0,1)");
}
else{
$(".semplice-navbar").css("border-bottom-color","rgba(0,0,0,0)");
}
代替
$(document).ready(function(){
$(window).on("scroll",function(){
var wn = $(window).scrollTop();
if(wn > 100){
$(".semplice-navbar").css("border-bottom-color:","rgba(0,0,0,1)");
}
else{
$(".semplice-navbar").css("border-bottom-color:","rgba(0,0,0,0)");
}
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