element. Why is Artemis 1 swinging well out of the plane of the moon's orbit on its return to Earth? When it prints to the console, it comes out looking like this: [object Field], [object Field] [object Field] - MDV - WY - REC FORM. We place the string in the backticks and embed our variables in the sentence. How to get a variable name as a string in PHP? Are we strictly talking vanilla here? Any explanation? The infer methods in JavaScript are quite different from traditional programming language output functions. Is there precedent for Supreme Court justices recusing themselves from cases when they have strong ties to groups with strong opinions on the case? Why does the autocompletion in TeXShop put ? I think the only reason this "doesn't answer the question" is because it doesn't start with "You cannot get the name of the constant or a variable in JavaScript. Why did NASA need to observationally confirm whether DART successfully redirected Dimorphos? Asking for help, clarification, or responding to other answers. Generally, console.log() showcases the output in an HTML tree format. if (State.value = "AL" && "CT" && "FL" && "GA" && "HI" && "IL" && "KY" && "LA" && "MD" && "DC" && "MI" && "MN" && "NJ" && "NM" && "NC" && "OR" && "SC" && "TX" && "UT" && "VA" && "WY") {, And when I change the &&, to || instead, the state changes to "AL", the first state in the if statement. The following sample code depicts a simple string used as a template literal. March 10, 2022. All JavaScript variables must be identified with unique names. However, we can use single quotes if we are encapsulating the entire structure in double-quotes. When you invoke the alert() method, the system dialogue will show the users specified information, followed by one OK button. Does an Antimagic Field suppress the ability score increases granted by the Manual or Tome magic items? Don't see any external libraries mentioned here, but Lodash has _.template(). Output: "I would like to receive email updates from this store FOO BAR BAZ.". debugVar({somefancyvariable}); @LaurenceLord it's called property shorthand. In JavaScript, we get to prompt the window to display messages on some actions. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. How to fight an unemployment tax bill that I do not owe in NY. Instead of using quotes (double quotes or single quotes), we use template literals defined with the backticks (` character in keyboard). If we forget to consider the type of parameter passed, there is a type mismatch. Pretty sure you accidentally transposed the variables. Thanks for contributing an answer to Stack Overflow! maybe for that you could store in a variable and later convert it to json for example {"instanceA": instanceA} and send it to the server using ajax or get/post call and that you can process in php and get name of the instance @deceze, sure, you know the name, but that doesn't mean you can/want to type it in manually. Challenges of a small company working with an external dev team from another country. If you're using dojo, sprintf is available as a module: This answer is good when you need to store template string in database and process it on demand. How do I replace all occurrences of a string in JavaScript? You should put your variables in this string like this format "%s1, %s2, %s12". So to print these types of statements we have to use the quotes with backslash(\) like shown below , Now have a look at the complete example below -, In JavaScript the strings can also be defined as objects using the keyword new like it is shown below. JavaScript equivalent to printf/string.format, https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Template_literals, The blockchain tech to build in a crypto winter (Ep. This site uses Akismet to reduce spam. This only works if the variable name is known of course. Cannot `cd` to E: drive using Windows CMD command line. How to characterize the regularity of a polygon? Its appearance depends on the current browser and operating system instead of CSS. This isn't able to be made into a function as it returns the name of the function's variable. When booking a flight when the clock is set back by one hour due to the daylight saving time, how can I know when the plane is scheduled to depart? var List = this.documentFileName.replace(/.pdf/,""); if (State.value == "AL" || "CT" || "FL" || "GA" || "HI" || "IL" || "KY" || "LA" || "MD" || "DC" || "MI" || "MN" || "NJ" || "NM" || "NC" || "OR" || "SC" || "TX" || "UT" || "VA" || "WY") {. That's not obtaining the variable name from the variable itself. Gj. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. The console.log() displays a char when it passed to it. There are various techniques to output data in JavaScript. In the example below, we define a string variable using the backtick. The other answer, that features util.format(), should be the accepted answer though preferably it would also mention ES6's template strings (which admittedly didn't exist in 2011). Thank you for your help and patience by the way. We are using Jsbin to examine the instances. how do you use a variable when giving the source of an image in javascript? How to create JavaScript regexes using string variables? @WakanTanka If yo create a proper question, I'll answer it there. For instance: The console.log() function will display a function when passed to it. The library has a method called sprintf(). Enjoy unlimited access on 5500+ Hand Picked Quality Video Courses. Any particular reason here for using back-ticks? Learn more, Modern Javascript for Beginners + Javascript Projects. I would like to send instance names from a browser to another program for callback method: In PHP: I use as Raynos said: const poem = "The black river"; const author = "Joseph Troll"; const favePoem = `My favorite poem is ${poem} by ${author}\.`; Or you can use: console.log('%s is %d. Why does FillingTransform not fill the enclosed areas on the edges in image. Find centralized, trusted content and collaborate around the technologies you use most. How to declare global Variables in JavaScript? Benefit: if the name is a JSON object, it will not be printed as "story" [object Object] "story", Method 3: When using ES6 as mentioned above. What do students mean by "makes the course harder than it needs to be"? There are syntax errors in it (you used "=" instead of "==", for example) as well as logical ones. If you are using node.js, console.log() takes format string as a first parameter: Here is a Multi-line String Literal example in Node.js. "tilt ` instead of single quote '" you save may day :), What do you mean "Its not possible" ? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. How can one variable equal multiple values? If you are still targeting browsers like IE11 and lower .. well, my heart goes out to you. But the issue is when I am using this inside a php file then $variable will be considered as php variable and not a js variable as php variable are in format $variable_name. From the example above, you can expect: x stores the value 5. y stores the value 6. How do I remove a property from a JavaScript object? Before Template Literals in ES6 of JavaScript, the development community followed the feature-rich library of sprintf.js. Many developers encounter issues trying to print in JavaScript despite the many methods available. Also you can't safely store that "pattern" in a retrieval system (like a config file or DB) and inject in the value of user later. It's fully supported in practically every browser you'll encounter these days. To declare variables in JavaScript, you need to use the var, let, Also there are many transpilers to turn ES6 into ES5 to fixed the compatibility issue! With that, we can create a funcion capable of settiing multiple outputs by value, reading from terminal arguments: This answer is similar to [@SethWhite's] (, is it possible to make function that will accept variable and print it's name? Good evening, I am trying to find a way to print the strings in my Javascript into the console log, that, or print the strings into a txt file. You have to say "If the patient is John or the patient is Peter or the patient is Mike". If we have to display the value of a variable in this string, we need to embed variables. No need to include an entire library. I needed this, don't want to use objects, and came up with the following solution, turning the question around. Why didn't Democrats legalize marijuana federally when they controlled Congress? You would have to resort to: Prior to Firefox 34 / Chrome 41 / Safari 9 / Microsoft Edge, no. This article will introduce how to insert variable(s) into a string in JavaScript. As you discovered, it will just print the name you give the function argument. Counting distinct values per polygon in QGIS. @JimSchubert This is sorta string interpolation, it just has a very specific use case. It has the same functionality as holding the string text in double-quotes ". If myFirstName is passed to a function (containing this code) as argument v, then variableName is reported as v instead of myFirstName. Can I cover an outlet with printed plates? Thanks for contributing an answer to Stack Overflow! result: You can reflect on types in javascript and get the name of properties and methods but what you need is sth like Lambda Expressions Trees in .NET, I think it's not be possible due to dynamic nature and lack of static type system in javascript. In this case, we can not use Double quotes in the final string without using the escape characters. More details and more capabilitie about it: Template literals are string literals at mozilla.org. No, it's not. It offers an easier way to embed variables in a given sentence than having to use cumbersome string concatenations. Heres how you can declare strings in JavaScript -, You can try to run the following code to learn how to declare strings in JavaScript . Connect and share knowledge within a single location that is structured and easy to search. Instead of converting the variable name into a string, I convert a string into a variable. Is there really a JS interpreter that won't inline all of the raw strings? Connect and share knowledge within a single location that is structured and easy to search. However, its limitation is that it calls the print dialog but not the print preview window. One of them is that, "this.documentFileName is undefined" in the console. How can I render a variable in a script that is in a variable? It will only print the file name if a mistake is found, thank you guys for your help! Essentially, print() calls up the native print dialog for that given window. MDN link to the "Shorthand property names" -. Return value: the return value is the value of the parameter assigned. If you master these methods, creating and printing JavaScript codes will be much easier. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Why do we order our adjectives in certain ways: "big, blue house" rather than "blue, big house"? Use Basic Formatting to Insert Variable Into String in JavaScript. Thom Parker - Software Developer at PDFScripting, Dedicated community for Japanese speakers. So, the best way to learn how to print to console in JavaScript is using this method. Required fields are marked *. For example: The function console.log(), displays a given messagewhen the message is passed onto it. The answer to the original question can be as simple as: Where the string can spread multiple lines, it makes templates or HTML/XML processes quite easy. @Mat I understand the code, but generally the OP question is used for something more complex as dynamic assignations where you can select the variable from a generated string. JavaScript does not have any print object or print methods compared to other programming languages. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. That doesn't answer the question. Not the answer you're looking for? In the example below, we define a string variable as an object. What was the last x86 processor that didn't have a microcode layer? Why did NASA need to observationally confirm whether DART successfully redirected Dimorphos? It can be a string or variable data. Good evening, I am trying to find a way to print the strings in my Javascript into the console log, that, or print the strings into a txt file. Shortest way I have found so far to get the variables name as a string: const name = obj => Object.keys (obj) [0]; const whatsMyName = "Snoop Doggy Dogg"; console.log ( "Variable Or where simply creating a dictionary to print a value is overkill. Will single quotes work? Lets hop into the codebases. Is playing an illegal Wild Draw 4 considered cheating or a bluff? Other arguments are the parameters respectively for that string. why i see more than ip for my site when i ping it from cmd. @htafoya - yes, something simple like nameof(varname) in C#. Do inheritances break Piketty's r>g model's conclusions? We have a normal string ready. console.log('%s', value) also should work. I have hopefully one more problem however, when I run the program, it will change the customer's state to WY. insert table function how to get the values in, Event.target.value is not working in my React code. op1 is of the Number data type, and we are using the %s to inject it into the final string. If variable position changes in that string, this function supports it too without changing the function parameters. example : for getting multi variables names in global scope. The way you have it written, I would expect it to set str to be "My username is Github on tjcafferkey". How to negotiate a raise, if they want me to get an offer letter? The only exception is that you can call the window.print() method in the JavaScript Maths Functions: Is Maths Really Easy in JavaScript? Here we do not use any variables, but the expressions included in template literals work for themselves. In the typical code sense, the console log is much closer to the Print command. The function console.log(), displays a number if it is passed to it. We will have an instance with the console.log(), document.write(), and alert() methods to print out a result. But if you want to print the values and HTML content using JavaScript, then there are For example: The console.log() function displays a number passed onto it along with the given messages. JavaScript console.log() method writes messages (logs) to the console. Get a string from any valid Javascript (variable, class): Probably pop would be better than indexing with [0], for safety (variable might be null). Another functions similar to console.log() is the console.dir(). What's the best way to do insert variables in a string in JavaScript? What are the rules to declare variables in C++. If you're already making use of the library it's worth checking out, and if you're not making use of Lodash you can always cherry pick methods from npm npm install lodash.template so you can cut down overhead. The value of template literals can be assigned to a new variable. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. If you like to have formated text you can do it as described above by Felix Kling. However, these methods have different usage and purposes. This conversion goes smoothly. See this SO answer for more details. This new template solves the problem of using single or double quotes inside the string with this backtick option one can use any special character inside a string without using any backslash. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Besides, the system dialogue does not contain any HTML. More info here: https://hacks.mozilla.org/2015/05/es6-in-depth-destructuring/. Connect and share knowledge within a single location that is structured and easy to search. How can you do that in javascript/node.js? How to print Javascript strings into console, or into a txt file. Agree It has various useful special features as follows. bill.dojotoolkit.org/api/1.9/dojox/string/sprintf, fully supported in practically every browser you'll encounter these days, https://www.npmjs.com/package/stringinject, The blockchain tech to build in a crypto winter (Ep. Copyright 2014EyeHunts.com. Nice, thanks for the tip! If you're looking for something quick and dirty, this might work: No, there is not. To learn more, see our tips on writing great answers. console.log(message) usage is simple: the argument message is logged to the console. There are a bunch of configuration options also -. I see a couple of problems with that; it uses concatenation rather than string formatting which is a red flag for me when doing code reviews, as it's usually more difficult to read and maintain. Its a property of the HTML DOM. JavaScript print variable | Example code. How to insert variables in JavaScript strings? It will be part of v0.5.3 and can be used like this: As of node.js >4.0 it gets more compatible with ES6 standard, where string manipulation greatly improved. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. https://www.npmjs.com/package/stringinject, https://github.com/tjcafferkey/stringinject. var Patient = Last + ", " + First + " " + Middle + " - " + Lab + " - " + State + " - " + "REC FORM"; I am looking for a way to print the variable, "File" so that we can see which files are not correctly spelled, and so that our checkers can correct the files later on. Do inheritances break Piketty's r>g model's conclusions? Also, email me if you want a job that doesn't involve catering to old browsers . It can be considered as a new string holding the values of your variables. The following code explains this phenomenon. if you are using ES6, the you should use the Template literals. Template literals was introduced in ES6. For instance: When you pass a string to the console.log() function, the function displays it along with the message given. Most programmers first learn to develop a program that prints Hello World!. We can use this method while logging with the, While using the basic formatting, placeholders used in the string should be corresponding to the type of data passed as a parameter. Parameters: the parameters accepted can be an object, an array, or any message. I know Java compiler does such optimization. After a couple of months I've been asked to leave small comments on my time-report sheet, is that bad?

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