經驗分享：10個簡單實用的jQuery程式碼片段

// HTML:
// <h1 id="anchor">Lorem Ipsum</h1>
// <p><a href="#anchor" class="topLink">Back to Top</a></p>

$(document).ready(function() {
	$("a.topLink").click(function() {
		$("html, body").animate({
			scrollTop: $($(this).attr("href")).offset().top + "px"
		}, {
			duration: 500,
			easing: "swing"
		});
		return false;
	});
});

$(window).bind("load", function() {
	// IMAGE RESIZE
	$(`#product_cat_list img`).each(function() {
		var maxWidth = 120;
		var maxHeight = 120;
		var ratio = 0;
		var width = $(this).width();
		var height = $(this).height();
	
		if(width > maxWidth){
			ratio = maxWidth / width;
			$(this).css("width", maxWidth);
			$(this).css("height", height * ratio);
			height = height * ratio;
		}
		var width = $(this).width();
		var height = $(this).height();
		if(height > maxHeight){
			ratio = maxHeight / height;
			$(this).css("height", maxHeight);
			$(this).css("width", width * ratio);
			width = width * ratio;
		}
	});
	//$("#contentpage img").show();
	// IMAGE RESIZE
});

var loading = false;
$(window).scroll(function(){
	if((($(window).scrollTop()+$(window).height())+250)>=$(document).height()){
		if(loading == false){
			loading = true;
			$(`#loadingbar`).css("display","block");
			$.get("load.php?start="+$(`#loaded_max`).val(), function(loaded){
				$(`body`).append(loaded);
				$(`#loaded_max`).val(parseInt($(`#loaded_max`).val())+50);
				$(`#loadingbar`).css("display","none");
				loading = false;
			});
		}
	}
});

$(document).ready(function() {
	$(`#loaded_max`).val(50);
});

$(`#pass`).keyup(function(e) {
     var strongRegex = new RegExp("^(?=.{8,})(?=.*[A-Z])(?=.*[a-z])(?=.*[0-9])(?=.*W).*$", "g");
     var mediumRegex = new RegExp("^(?=.{7,})(((?=.*[A-Z])(?=.*[a-z]))|((?=.*[A-Z])(?=.*[0-9]))|((?=.*[a-z])(?=.*[0-9]))).*$", "g");
     var enoughRegex = new RegExp("(?=.{6,}).*", "g");
     if (false == enoughRegex.test($(this).val())) {
             $(`#passstrength`).html(`More Characters`);
     } else if (strongRegex.test($(this).val())) {
             $(`#passstrength`).className = `ok`;
             $(`#passstrength`).html(`Strong!`);
     } else if (mediumRegex.test($(this).val())) {
             $(`#passstrength`).className = `alert`;
             $(`#passstrength`).html(`Medium!`);
     } else {
             $(`#passstrength`).className = `error`;
             $(`#passstrength`).html(`Weak!`);
     }
     return true;
});

var maxHeight = 0;

$("div").each(function(){
   if ($(this).height() > maxHeight) { maxHeight = $(this).height(); }
});

$("div").height(maxHeight);

$(`.pngfix`).each( function() {
   $(this).attr(`writing-mode`, `tb-rl`);
   $(this).css(`background-image`, `none`);
   $(this).css( `filter`, `progid:DXImageTransform.Microsoft.AlphaImageLoader(src="path/to/image.png",sizingMethod="scale")`);
});

function parseJson(){
	//Start by calling the json object, I will be using a 
        //file from my own site for the tutorial 
	//Then we declare a callback function to process the data
	$.getJSON(`hcj.json`,getPosts);
 
	//The process function, I am going to get the title, 
        //url and excerpt for 5 latest posts
	function getPosts(data){
		//Start a for loop with a limit of 5 
		for(var i = 0; i < 5; i++){
			var strPost = `<h2>` 
				      + data.posts[i].title
				      + `</h2>`
				      + `<p>`
				      + data.posts[i].excerpt
				      + `</p>`
				      + `<a href="`
				      + data.posts[i].url
				      + `" title="Read `
				      + data.posts[i].title
				      + `">Read ></a>`;
			//Append the body with the string
			$(`body`).append(strPost);
		}
	}
}
 
//Fire off the function in your document ready
$(document).ready(function(){
	parseJson();				   
});

$(`div:odd`).css("background-color", "#F4F4F8");
$(`div:even`).css("background-color", "#EFF1F1");

var nextimage = "/images/some-image.jpg";
$(document).ready(function(){
	window.setTimeout(function(){
		var img = $("<img>").attr("src", nextimage).load(function(){
			//all done
		});
	}, 100);
});

<div class="myBox">
     blah blah blah.
    <a href="http://google.com">link</a>
</div>

$(".myBox").click(function(){
     window.location=$(this).find("a").attr("href"); 
     return false;
});