There’s no casting in javascript, so you cannot throw if “casting fails”.Typescript supports casting but that’s only for compilation time, and you can do it like this: You can check at runtime if the value is valid and if not throw an error, i.e.: Edit As @huyz pointed out, there’s no need for the type assertion because isToDoDto is … Read more
I think that the body isn’t correct for an application/x-www-form-urlencoded content type. You could try to use this: Hope it helps you, Thierry
TypeScript relies on definition files that define the types, interfaces, etc. for libraries. I’m not familiar with FountainJS, but I’m guessing it’s smart enough to create a typings.json file in your workspace. If so, all you need to do is install typings (npm install typings –global) and then use it to install the definitions by doing typings install. If they … Read more
Simplest solution is to allow type inference to work and not specify any type at all. If you need to specify a type, seeing as the type is not consistent between the browser and node declarations, you could use ReturnType to specify that the type of the variable is whatever the return type of setTimeout is: Alternately, window.setTimeout can also be … Read more
A few tips in order restart the terminal restart the machine reinstall nodejs + then run npm install typescript -g If it still doesn’t work run npm config get prefix to see where npm install -g is putting files (append bin to the output) and make sure that they are in the path (the node js setup does this. Maybe … Read more
These are some quick shots at this to show a few different ways. They are by no means “complete” and as a disclaimer, I don’t think it’s a good idea to do it like this. Also the code isn’t too clean since I just typed it together rather quickly. Also as a note: Of course … Read more
The solution for me was to convert my code from using CommonJS (require, module.exports, etc) to ES Modules (import, export, etc.) The TypeScript documentation also appears to recommend ES Module syntax: TypeScript Modules Of course there’s a lot more to it than this, but as a start: Replace instances of require with import, e.g. Replace: … Read more
Is key-value pair available in Typescript? Yes. Called an index signature: Here keys are string and values are number. More You can use an es6 Map for proper dictionaries, polyfilled by core-js.
Try npm install -g typescript@latest. You can also use npm update instead of install, without the latest modifier.
The problem is in your main.ts file. You are trying to bootstrap App, which is not a real module. Delete these two lines and replace with the following line: and it will fix your error.