Can the interface in typescript be converted into Javascript? If so, what is the process for converting the typescript code shown below into Javascript.
interface xyz{
something? : string,
somethingStyle? : Textstyle
}
Can the interface in typescript be converted into Javascript? If so, what is the process for converting the typescript code shown below into Javascript.
interface xyz{
something? : string,
somethingStyle? : Textstyle
}
JavaScript does not include built-in support for interfaces. Interfaces are a feature mainly used by compilers in other programming languages.
Although your inquiry may not explicitly mention it, I am assuming that you are looking to transform the compile time check into a runtime check automatically. To address this, I have referenced this resource as a foundation for my response.
Beginning with your example and expanding on what Textstyle could entail, we have created xyz.ts:
interface Textstyle {
bold: boolean;
font: string;
}
export interface xyz {
something?: string;
somethingStyle?: Textstyle;
}
Next, we proceed to install the necessary dependencies for our example (as shown in the shell session below):
$ echo '{"private":true}' >package.json
$ npm install --save-dev typescript @tsconfig/recommended ts-json-schema-generator
$ echo '{"extends":"@tsconfig/recommended/tsconfig.json"}' >tsconfig.json
$ npx ts-json-schema-generator --path 'xyz.ts' >xyz_schema.json
Upon examining the output produced by ts-json-schema-generator in the file xyz_schema.json, we uncover:
{
"$ref": "#/definitions/xyz",
"$schema": "http://json-schema.org/draft-07/schema#",
"definitions": {
"xyz": {
"additionalProperties": false,
"properties": {
"something": {
"type": "string"
},
"somethingStyle": {
"additionalProperties": false,
"properties": {
"bold": {
"type": "boolean"
},
"font": {
"type": "string"
}
},
"required": [
"bold",
"font"
],
"type": "object"
}
},
"type": "object"
}
}
}
Given that JSON schema is a standardized format, we can leverage various tools to validate our objects against it. Below is a script utilizing Ajv:
const Ajv = require("ajv");
const schema = require("./xyz_schema.json");
const ajv = new Ajv();
const validate = ajv.compile(schema);
const x1 = {
something: "hello world",
somethingStyle: {
bold: true,
font: "comic sans",
},
};
const x2 = {
wibbles: "wobble",
};
const testCases = [x1, x2];
testCases.forEach((x, i) => {
const valid = validate(x);
if (valid) {
console.log(`test case ${i} is valid`);
} else {
console.error(`test case ${i} is invalid`);
console.error(validate.errors);
}
});
The above code results in the following output:
test case 0 is valid
test case 1 is invalid
[
{
instancePath: '',
schemaPath: '#/definitions/xyz/additionalProperties',
keyword: 'additionalProperties',
params: { additionalProperty: 'wibbles' },
message: 'must NOT have additional properties'
}
]
In a recent forum thread, an individual posed the question about how to eliminate shaders from html. The discussion revolved around finding alternatives to embedding shaders in webGL code: WebGL - is there an alternative to embedding shaders in HTML? The ...
I am encountering an issue with this code while trying to integrate it with a new JSON object called 'new_json'. Specifically, I need the links in this code to be created based on the nodes' IDs. Can anyone provide assistance with this? va ...
Recently, I implemented a newsletter pop-up feature that allows users to sign up for a weekly newsletter. When a user tries to submit without entering their email address, an alert message pops up prompting them to do so. This is beneficial but now I wan ...
Several questions have been asked about this topic, but none of them seem to have a definitive answer. What I am looking to do is calculate the time it takes to navigate to a screen. The timer will start here: navigation.navigate("SomePage") Essentially, ...
AngularJS has truly captured my interest with its powerful capabilities. I am delving deeper into the world of Angular and finding myself falling in love with it more each day. Despite my efforts, certain doubts continue to linger, leaving me eager for cla ...
I am trying to create a reverse tree view, starting from the bottom and moving up. What modifications do I need to make? Here is the link to my JS Fiddle: ...
Can anyone provide guidance on how to begin with an HTML5 bandwidth test? I am trying to replicate a flash-based version and any recommendations would be greatly appreciated. ...
Suppose I have an HTML structure like this and I need to create a button for scrolling using scrollTo. However, I've come across the information that scrollTo doesn't work well with height: 100vh and overflow: auto. What would be the best way to ...
I'm currently working on developing a TypeScript application where each class is saved in its own .ts file. I prefer to use VS Code for this project. So far, my compile task seems to be functioning correctly (transpiling .ts files into .js files). How ...
I am facing an issue with the code below: document.addEventListener("DOMContentLoaded", function(event) { // Select all the read more buttons and hidden contents const readMoreButtons = document.querySelectorAll(".read-more"); const hiddenConten ...
How can I make HttpClient return the data in JSON Object format? The Angular documentation states that HttpClient should automatically parse returned JSON data as an object. However, in my project, it only returns the data as a string. Although using JSO ...
In my Ionic app built with AngularJS, I have a form where the date and time are displayed separately but share the same data-ng-model: <input type="date" id ="actualVisitDate" data-ng-model="actualVisitDate" required> <input type="time" id ="actu ...
I am looking to retrieve the coordinates of a location as the output of a function. The coordinates are already assigned within a fetch method, with latitudes stored as coordinates.lat and longitudes stored as coordinates.lng. [Currently, it is returning ...
I am working on dynamically plotting a Morris line using data from a local file called sales.php (in json format): [ { year: '2008', value: 20 }, { year: '2009', value: 10 }, { year: '2010', value: 5 }, { year: ' ...
In my current Angular project, I have been utilizing Capacitor. Within my angular.json file, I have set up various build targets such as development, staging, and production. To deploy with different configurations, I use the command ng build --configurati ...
Struggling with this issue for hours, I can't seem to figure out how to: Adjust the position of the placeholder text (Search) by 10 pixels to the right in my select component Reduce the height of the field (maybe by 5px) without success. Could someo ...
I need the select option dropdown values to display employee names along with their titles in a lined up format. For instance, if my values are: Bob Smith Director Mike Kawazki HR Jane Doe Manager I want them to be shown as: Bob Smith Director Mi ...
In my application, I am utilizing two scope variables: $scope.banner and $scope.defaultBanner. The banner is fetched using a service, but in cases where the banner file does not exist, the variable will be empty as the service returns nothing. My goal is ...
I've been trying, but all I can manage is: <img width='220' height='280' src='chrome-extension://okjaohhbffepkcfacapapdhkmnebgiba/johnny.jpg' class="me"/> Unfortunately, this code only works in Chrome. Is there a ...
I am currently working on implementing a feature that allows users to add multiple workers by clicking the "Add worker" button. However, I have encountered an issue where placing the workers array inside the management object prevents this feature from f ...