April 2, 2019
HomeKnowledge BaseDeclare Keyword in Typescript for Missing Type Definition File

Declare Keyword in Typescript for Missing Type Definition File

By  Knowledge Base  0 Comments
In this tutorial, you will learn how to use declare keyword to get rid of compilation errors in case of missing type definition file for any javascript library. I have tried my best to keep it pure basic and simple as much as possible.

index.html

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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>
</head>
<body>
<!-- Javascript Library -->
<script src="employee.js"></script>
<script src="index.js"></script>
</body>
</html>
<!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> </head> <body> <!-- Javascript Library --> <script src="employee.js"></script> <script src="index.js"></script> </body> </html>
<!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>
</head>
<body>
    
    <!-- Javascript Library -->
    <script src="employee.js"></script>
    <script src="index.js"></script>
</body>
</html>

 

index.ts

declare var printName:any;

printName('James');

employee.js

const printName = (name) =>{
    console.log(name);
};
 
         

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