Generate the JavaScript file only if the Typescript file is error-free, to ensure a smooth compilation process

Take a look at the following TypeScript code snippet:

class formal
{
    private startString: String = "";
    constructor(startString:String)
    {
        this.startString = startString;
    }

    public sayHello = function() :Number {
       alert(this.startString);
    }     

}

var myIntro = new formal("hello world");
myIntro.sayHello();

The current issue is:

"A function that doesn't have a return type of 'void' or 'any' must return a value. An object representing a numerical value, derived from any JavaScript numbers having 64-bit floating-point precision."

Upon executing the tsc command, it generates the corresponding JS file even with errors in the TypeScript file. Is there a way to prevent the generation of the JS file until all TypeScript errors are resolved?

Answer №1

To prevent emitting output on error while compiling, include the flag --noEmitOnError in your compiler settings.

The correct command should resemble: tsc myFile.ts -w --noEmitOnError

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