To take object out of array based on attribute value with TypeScript, we use the find method.
For instance, we write
const array = [
{ id: 1, value: "itemname" },
{ id: 2, value: "itemname" },
];
const item1 = array.find((i) => i.id === 1);
to call array.find with a callback that finds the first object in array that has id equal to 1.
To check whether an array contains a string in TypeScript, we call the includes method.
For instance, we write
console.log(channelArray.includes("three"));
to check if the channelArray has 'three' in it with includes.
To fix the "TS7053 Element implicitly has an ‘any’ type" error in TypeScript, we can create a type with an index signature that allows any properties to be in the object.
For instance, we write
const myObj: { [index: string]: any } = {};
to set myObj to the { [index: string]: any } type so that the object assigned can have any properties in it.
The { [index: string]: any } type is an object type that allows any string keys as its property name and any value as their values.
The error will then go away since we set myObj to an object literal.
To loop through an array in TypeScript, we can use a for-of loop.
For instance, we write
for (const product of products) {
console.log(product.productDesc);
}
to loop through the products array with a for-of loop.
In it, we log the productDesc property of the products object entry being looped through, which is stored in product.
To import image with TypeScript, we can use declare to declare the type for image files.
For instance, we write
declare module "*.png" {
const value: any;
export = value;
}
to declare the type for modules with the .png extension.
We just allow any property to be exported with
const value: any;
export = value;
And then we can import .png files without errors since png files are recognized by the TypeScript compiler after we added the module declaration.