Typescript: Convert a Bool to String Value
I Have a Really Simple Issue, I Can't Get to Convert a Simple Boolean to a String Value in Typescript. I Have Been Roaming Through Documentation and I Could...
I have a really simple issue, I can't get to convert a simple boolean to a string value in TypeScript.
I have been roaming through documentation and I could not find anything helpful. Of course I tried to use the toString() method but it does not seem to be implemented on bool.
Edit: I have almost no JavaScript knowledge and came to TypeScript with a C#/Java background.
5 Answers
This is either a bug in TypeScript or a concious design decision, but you can work around it using:
var myBool: bool = true;
var myString: string = String(myBool);
alert(myString);
In JavaScript booleans override the toString method, which is available on any Object (pretty much everything in JavaScript inherits from Object), so...
var myString: string = myBool.toString();
... should probably be valid.
There is also another work around for this, but I personally find it a bit nasty:
var myBool: bool = true;
var myString: string = <string><any> myBool;
alert(myString);
For those looking for an alternative, another way to go about this is to use a template literal like the following:
const booleanVal = true;
const stringBoolean = `${booleanVal}`;
The real strength in this comes if you don't know for sure that you are getting a boolean value. Although in this question we know it is a boolean, thats not always the case, even in TypeScript(if not fully taken advantage of).
One approach is to use the Ternary operator:
myString = myBool? "true":"false";
This if you have to handle null values too:
stringVar = boolVar===null? "null" : (boolVar?"true":"false");
return Boolean(b) ? 'true':'false'
David Miller brings 15 years of experience in global economics, personal finance strategy, and market dynamics. He specializes in turning complex economic trends into actionable insights for everyday readers.
