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Sebastian Angelo-Perez
1,835 PointsMissing "use strict" statement? (According to Dreamweaver)
I just wrote the following code (same as the example from David). When I wrote it in Dreamweaver I got the error: Missing "Use strict" statament...why?
function alertRandom() { var randomNumber = Math.floor(Math.random() * 6 ) + 1; alert(randomNumber); }
alertRandom();
alertRandom();
alertRandom();
alertRandom();
3 Answers
Sebastian Angelo-Perez
1,835 PointsThanks to you both :-) Thanks for the links. I see that one can invoke the strict mode with a simple line of code...apparently this is by default in Dreamweaver when you open a JavaScript file (I seriously need to research more about this, I am still a beginner). After reading your comments I've started to believe that there might not be agreement in the JavaScript community, about using or not using "use strict"? Guys, you are awesome, thanks again. Cheers
eck
43,038 PointsIt seems that Dreamweaver wants you to opt into using a strict version of JavaScript. Check out that link to learn about what is means to write you JS in strict mode.
Also, I am not so familiar with Dreamweaver, but there is probably a setting somewhere to turn off the prompt or error messaging for "use strict", since it is not required to write functional JS.
Sara Hardy
8,650 PointsWhile this is a good answer, I'd probably opt to just use strict mode rather than trying to turn off the setting.
eck
43,038 PointsYes, there are advantages to writing JS with "use strict" and virtually no downside now that is has ~90% browser support.
You will find in my previous link to MDN that these advantages include potential performance gains and more secure, "future proof" code. This is because the allowed syntax is adjusted to reflect eventual changes to JavaScript in the browser. Again, you should read the page to gain a better understanding :D
Sebastian Angelo-Perez
1,835 Pointsok, I'll do it. There is actually a course here in Treehouse about "use strict"...
eck
43,038 Pointseck
43,038 PointsGlad the stuff was helpful! But I just wanted to clear up that I agree with Sara that "use strict" is the better practice. Once you do some more research on it you should totally start including it in your projects.