- The strict mode will make more changes to normal javaScript semantic.
- It is not a statement, but a literal expression.
- The use strict is used to indicate that the code should be executed in "strict mode".
- Strict mode can be declared by adding "use strict"; to the beginning of a script or a function
- For the global scope we can declare at the beginning of a script, (all code in the script will execute in strict mode).
Code:-
- <!DOCTYPE html>
- <html>
- <head>
- <meta name="viewport" content="width=device-width, initial-scale=1">
- </head>
- <body>
- <h1>"strict" Should declare the variable using var keyword</h1>
- <input type="button" onclick="fun_strict();" value="strict function">
- <script>
- function fun_strict()
- {
- "use strict";
- try
- {
- a = 90;
- }
- catch (err)
- {
- alert("Error is : " + err.message);
- }
- }
- </script>
- </body>
- </html>
Strict mode-var:- genius student
Reviewed by Network security
on
November 04, 2019
Rating:
Reviewed by Network security
on
November 04, 2019
Rating:
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