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February 5, 2018 08:57
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Javascript method chain example
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<!DOCTYPE html> | |
<html lang="en"> | |
<head> | |
<meta charset="UTF-8"> | |
<meta name="viewport" content="width=device-width, initial-scale=1.0"> | |
<meta http-equiv="X-UA-Compatible" content="ie=edge"> | |
<title>Document</title> | |
<script src="http://code.jquery.com/jquery-3.3.1.min.js"></script> | |
</head> | |
<body> | |
<div class="members-wrapper"></div> | |
<script> | |
// Javascript chain example from | |
// http://javascriptissexy.com/beautiful-javascript-easily-create-chainable-cascading-methods-for-expressiveness/ | |
// The data | |
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} | |
]; | |
// A quick utility function that does what it says: | |
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; | |
} | |
} | |
return this; | |
}, | |
formatName: function () { | |
if (this.currentUser) { | |
console.log(this.currentUser); | |
this.currentUser.fullName = | |
titleCaseName(this.currentUser.firstName + " " + | |
titleCaseName(this.currentUser.lastName)); | |
} | |
return this; | |
}, | |
createLayout: function () { | |
if (this.currentUser) { | |
console.log(this.currentUser.fullName); | |
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); | |
} | |
}; | |
userController.findUser("test2@test2.com").formatName().createLayout().displayUser(); | |
</script> | |
</body> | |
</html> |
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Result:
Member: Peter Brecht
ID: 103
Email: test2@test2.com