Is there a utility function in Deno that can stringify an Object or primitive similar to Node.js util.inspect?
For instance, if I have a JSON object in Node.js and want to display its contents:
> m = {k1:'v1', k2:'v2'}
{ k1: 'v1', k2: 'v2' }
> util.inspect(m)
'{ k1: \'v1\', k2: \'v2\' }'
In Deno, the counterpart to Node's util.inspect is Deno.inspect.
Illustrated in the Deno REPL:
> obj = {key1: 'value1', key2: 'value2'}
{ key1: "value1", key2: "value2" }
> Deno.inspect(obj)
{ key1: "value1", key2: "value2" }
Furthermore, in order to customize the results returned by Deno.inspect, you have the option to implement a Deno.customInspect method within your classes as shown below:
class anotherClass {
// code ...
[Symbol.for("Deno.customInspect")]() {
return 'any random string';
}
}
Take a look at the official documentation for more information on Deno.inspect and Deno.customInspect
It is recommended to utilize Deno.inspect(someObject) in most cases.
If you need to customize the string representation of Deno.inspect for a specific class, starting from Deno 1.19, you should implement something similar to the following:
class MyClass {
// …
[Symbol.for("Deno.customInspect")]() {
return "custom string representation;
}
// …
}
Any objects displayed using console.log(someObject) will also be impacted by this customization.
You can find more information in the documentation here.
Please note that the method demonstrated by @Lukalot has been deprecated since Deno 1.19 and may not work in upcoming versions.
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