Questions tagged as 'javascript'

Tagged questions
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How to integrate Jest and Flow

I know some people use Jest together with Flow , even more because it's from Facebook, I have a React project, and I'm trying to do this integration, but Jest does not recognize Flow typing tags. Error Message FAIL __tests__/c...
asked by 11.08.2017 / 21:08
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Is it possible to send messages from one WebWorker to another WebWorker?

I have a page where I want to use a set of WebWorkers to perform tasks in the background. Each WebWorker has a specific function, but potentially useful to others. It is simple to receive / send messages to and from a WebWorker created by the p...
asked by 11.12.2013 / 23:28
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How to make a dynamic form?

I've implemented a script that dynamically adds fields to a form, in this case a form to add products and their quantity. The code is here: link I am finding this code very bureaucratic, because every time the button "NewProduct" is trig...
asked by 07.11.2014 / 19:50
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Choose option through a choice made previously

I'm new to JavaScript and I needed to know what code I can use for this situation: For example, I have a column called "Product" which is of the type choice and I wanted to select an option from that column for example "chocolate" automati...
asked by 20.11.2015 / 11:42
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How to retrieve the number of characters via regular expression?

How to know the amount of repeated characters (example: Goi a b a = 2 letters a ) , consecutive characters (sequence of letters abc .. ) and consecutive numbers (example: 12345 .. ) within a word, using regular expression? Is this possi...
asked by 02.02.2015 / 17:37
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What is the correct way to declare a javascript function? [duplicate]

For some time, I have been observing the use of two forms of declaration of function javascript , being the following: - Form 1: function soma1(val1, val2){ return val1 + val2; }; - Form 2: var soma2 = function(v...
asked by 20.03.2015 / 21:55
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How do I bind events to dynamically created elements and pass parameters?

I have a table that is generated via ajax and a certain column generates a link. As it was implemented, it currently writes a html with javascript intrusive. Something like below: return "<a href=\"#\" id=\"detalhe-nota-" + record.dat...
asked by 25.11.2015 / 19:34
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How to calculate total table value with JavaScript?

Imagine that I have a table with a number of rows that varies dynamically (that is, the user can insert more rows), each row having two columns with two text fields: quantidade and valor . What would be the most performative...
asked by 02.09.2014 / 23:07
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How to get line separation from the system

Some operating systems (i.e., Windows and BSD) like to break lines with Carriage Return (CR) followed by Line Feed (LF), or \r\n . While GNU / Linux, OS X and other Unix-like ones usually break only with LF ( \n )....
asked by 15.09.2014 / 21:05
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Make an "or" inside the key of an attribute in JS

I have the following code: scope.cm = 1; scope.mm = 2; scope.km = 3; tipoDeMedida[scope.cm || scope.mm || scope.km] = function(arrayQualquer){ //executo meu bloco de código X. } tipoDeMedida[scope.km](arrayQualquer)...
asked by 24.02.2017 / 18:29