Recent questions tagged javascript

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How to apply string object value to a variable Ex. var str='{a:"www"}' Now how to set var obj={a:"www"} I try eval() but not working See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - Debounce function implemented with promises

I'm trying to implement a debounce function that works with a promise in javascript. That way, each caller can ... to do it. Any thoughts? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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363 views

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javascript - How can I pass argument with requestAnimationFrame?

In the main program I randomly choose an object which I'd like to animate, so I call the function with ... anim.mainFunc(ArrayOfAnimObject[n]); See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - How can I declare a function from another file in Typescript?

I have the following function in a file: function alertWin(title, message) { ....... ....... } In ... then what would the definition look like? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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333 views

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javascript - Each then() should return a value or throw when using Promises

I have a few async methods that I need to wait for completion before I return from the request. I'm using Promises, ... on, which I wait for }) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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209 views

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javascript - Listen for change of class in jquery

Is there a way in jquery to listen for a change to a node's class and then take some action on it if the ... a div at that moment. Thanks! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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306 views

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javascript - Loop through all Mongo collections and execute query

First of, I'm quite new to mongodb. Here's my question I've not been able to find a solution to. Let's say I ... (getTimestamp N/A)") } } }); See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - jQuery, AJAX, JSONP: how to actually send an array even if it's empty?

I've already read those questions but none of them answer to my need: Testing for an empty array object ... traditional: true without success. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - Can I catch an error from async without using await?

Can errors from a non-awaited async call be caught, sent to an original encapsulating try/catch, or raise an ... and executing it with node. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - Merging two collections using Underscore.JS

Provided I have two collections: c1 - [{a:1},{a:2},{a:3}] and c2 - [{a:1},{a:7},{a:8}] ... c2 myself) - is that trivial in Underscore.JS? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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365 views

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javascript - JSON.stringify doesn't escape?

I'm using `JSON.stringify? to stringify an object, but the quotes are not escaped? Am I misunderstanding that it's ... "console":{"free":false}} See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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184 views

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javascript - How to handle warnings for proprietary/custom properties of built-in objects in TypeScript

I am using Personas which relies on the proprietary property navigator.id. Since this property is not standard, the ... greeter(user); }); See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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122 views

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javascript - How to get the current url in the browser in Angular 2 using TypeScript?

I need to get the current URL present in the browser in my Angular 2 application. In JavaScript normally we ... 2 using TypeScript? Thanks. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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392 views

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javascript - How to preload images in React.js?

How to preload images in React.js? I have dropdown select component which works like menu , but i have to ... be to loaded them with webpack. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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587 views

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javascript - Conditionally add target="_blank" to links with Angular JS

I am building a navigation tree in Angular JS. Most links in the tree will point to pages within my website, ... Can anyone help me out? Thanks See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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556 views

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javascript - How to prevent pull-down-to-refresh of mobile chrome

I want to prevent pull-down-to-refresh of mobile chrome(especially iOS chrome). My web application has vertical ... useful answer with example. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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410 views

1 answer

javascript - how to check if file exists in Firebase Storage?

When using the database you can do snapshot.exists() to check if certain data exists. According to the docs ... file exists in Firebase Storage? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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276 views

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javascript - Jquery: Possible to dynamically change source of Autocomplete widget?

Greetings, I am using the official Autocomplete jquery widget and am having troubles dynamically changing a variable (selectType) ... 3 }); }); See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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276 views

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javascript - How to make a redirect (301) in Node.js / Express?

I have a static site, a simple single page layout that I deploy in Dokku. I need to make a redirect ( ... that works, but without redirects. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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150 views

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javascript - Replace first character of string

I have a string |0|0|0|0 but it needs to be 0|0|0|0 How do I replace the first character ('|') with (''). eg replace('|','') (with JavaScript) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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144 views

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javascript - Sort array by date gives unexpected results

This will sound as an easy problem but I spent my Sunday trying to figure out what's wrong with my ... something wrong with this code? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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378 views

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javascript - jQuery validate only validates one field

I am using jQuery validate to validate a form. I have two text boxes on my form and only the first one will add the ... Edit 2: I'm using MVC 3 See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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631 views

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javascript - Programmatically change a chart title in highcharts

I have a simple column chart that I update via AJAX, and all is working fine except I cannot change the ... help will be greatly appreciated. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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307 views

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javascript - Detect focus initiated by tab key?

I want to detect the focus event of an element, but only if it was initiated by the user pressing the ... in a relatively simple way? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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230 views

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javascript - Is the sort order of jQuery's $().each() guaranteed?

On one page of my site I have have a list of entries created by the user - standard HTML <ul> with < ... for iterating through them in order? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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120 views

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javascript - Unexpected token < in first line of HTML

I have an HTML file : <!DOCTYPE HTML> <html lang="en-US" ng-app="Todo"> <head> <meta charset="UTF-8" ... for core.js. What might be wrong? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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453 views

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javascript - How to check if a cloud firestore document exists when using realtime updates

This works: db.collection('users').doc('id').get() .then((docSnapshot) => { if (docSnapshot.exists) { db. ... the db. Is there a better way? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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140 views

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javascript - run python script with html button

I have a Python script a.py that prompts for a URL: url = input('URL: ') It uses modules to check ... the user clicks on the Download button. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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