html JS-方法-chaining.html
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// The data store:
var usersData = [
{firstName:"tommy", lastName:"MalCom", email:"test@test.com", id:102},
{firstName:"Peter", lastName:"brecHt", email:"test2@test2.com", id:103},
{firstName:"RoHan", lastName:"sahu", email:"test3@test3.com", id:104}
];
function titleCaseName(str)
{
return str.replace(/\w\S*/g, function(txt){return txt.charAt(0).toUpperCase() + txt.substr(1).toLowerCase();});
}
// Our object with the chainable methods
var userController = {
currentUser:"",
findUser:function (userEmail) {
var arrayLength = usersData.length, i;
for (i = arrayLength - 1; i >= 0; i--) {
if (usersData[i].email === userEmail) {
this.currentUser = usersData[i];
break;
}
}
//console.log(this);
return this;
},
formatName:function () {
if (this.currentUser) {
this.currentUser.fullName = titleCaseName (this.currentUser.firstName + " " + this.currentUser.lastName);
}
return this;
},
createLayout:function () {
if (this.currentUser) {
this.currentUser.viewData = "<h2>Member: " + this.currentUser.fullName + "</h2>" + "<p>ID: " + this.currentUser.id + "</p>" + "<p>Email: " + this.currentUser.email + "</p>";
}
return this;
},
displayUser:function () {
if (!this.currentUser) return;
$(".members-wrapper").append(this.currentUser.viewData);
}
};
// Now, use the chaninable methods with expressiveness:
userController.findUser("test3@test3.com").formatName().createLayout().displayUser();
/*
same as
userController.findUser("test3@test3.com")
.formatName()
.createLayout()
.displayUser()
same as
userController.findUser("test3@test3.com");
userController.formatName();
userController.createLayout();
userController.displayUser();
*/
<!DOCTYPE html>
<html>
<head>
<meta name="description" content="js method chaining" />
<script src="http://code.jquery.com/jquery-latest.js"></script>
<meta charset=utf-8 />
<title>JS Bin</title>
</head>
<body>
<div class="members-wrapper"></div>
<div class="logger"></div>
<script>
</script>
</body>
</html>
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