typescript-type-checker is Runtime Type Checker for Typescript.
It generates runtime type checking sanitizer script for Typescript.
typescript-type-checker supports all default types, arrays, and custom types.
npm install typescript-type-checker
You can use typescript-type-checker both commandline and script.
import { buildScript } from "typescript-type-checker";
const srcDir = "./src/lib";
const outputPath = "./out.ts";
const strictMode = false;
buildScript(srcDir, outputPath, strictMode);args:
- --src: Input directory which contains .ts files
- --out: Output directory which sanitizer script will be saved to
- --strict: Whether use strict mode. In strict mode, script does not check string value can be converted to number or boolean
example:
$ npx typescript-type-checker --src "./src/lib" --out "./out/sanitizer.ts" --strict
Then you can get sanitizer script at "./out/sanitizer.ts".
./src/lib/example.ts
export interface Foo {
number: number;
boolean: boolean;
maybeString?: string;
bar: Bar;
}
interface Bar {
numbers: number[];
}function sanitizeFoo(checker: any) {
if (
typeof checker.number != "number" ||
typeof checker.boolean != "boolean" ||
(checker.maybeString != undefined &&
typeof checker.maybeString != "string") ||
!sanitizeBar(checker.bar)
) {
return false;
}
return true;
}
function sanitizeBar(checker: any) {
if (!sanitizenumberArray(checker.numbers)) {
return false;
}
return true;
}
function sanitizenumberArray(checker: any) {
if (!Array.isArray(checker)) {
return false;
}
for (let i = 0; i < checker.length; i++) {
if (typeof checker[i] != "number") {
return false;
}
}
return true;
}function sanitizeFoo(checker: any) {
if (
typeof checker.number == "string" &&
Boolean(checker.number.trim()) &&
!Number.isNaN(Number(checker.number))
) {
checker.number = Number(checker.number);
}
if (
typeof checker.boolean == "string" &&
(checker.boolean == "true" || checker.boolean == "false")
) {
checker.boolean = checker.boolean == "true";
}
if (
typeof checker.number != "number" ||
typeof checker.boolean != "boolean" ||
(checker.maybeString != undefined &&
typeof checker.maybeString != "string") ||
!sanitizeBar(checker.bar)
) {
return false;
}
return true;
}
function sanitizeBar(checker: any) {
if (!sanitizenumberArray(checker.numbers)) {
return false;
}
return true;
}
function sanitizenumberArray(checker: any) {
if (!Array.isArray(checker)) {
return false;
}
for (let i = 0; i < checker.length; i++) {
if (typeof checker[i] != "number") {
return false;
}
}
return true;
}
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