How to Use Goto in JavaScript

How can I use goto in Javascript?

Absolutely! There is a project called Summer of Goto that allows you use JavaScript at its fullest potential and will revolutionize the way you can write your code.

This JavaScript preprocessing tool allows you to create a label and then goto it using this syntax:

[lbl] <label-name>
goto <label-name>

For example, the example in the question can be written as follows:

[lbl] start:
alert("LATHER");
alert("RINSE");
[lbl] repeat: goto start;

Note that you are not just limited to simple trivial programs like an endless LATHER RINSE repeat cycle—the possibilities afforded by goto are endless and you can even make a Hello, world! message to the JavaScript console 538 times, like this:

var i = 0;
[lbl] start:
console.log("Hello, world!");
i++;
if(i < 538) goto start;

You can read more about how goto is implemented, but basically, it does some JavaScript preprocessing that takes advantage of the fact that you can simulate a goto with a labelled while loop. So, when you write the "Hello, world!" program above, it gets translated to something like this:

var i = 0;
start: while(true) {
  console.log("Hello, world!");
  i++;
  if(i < 538) continue start;
  break;
}

There are some limitations to this preprocessing process, because while loops cannot stretch across multiple functions or blocks. That's not a big deal, though—I'm sure the benefits of being able to take advantage of goto in JavaScript will absolutely overwhelm you.

All above link that lead to goto.js library is ALL DEAD, here is links needed:

goto.js (uncompressed) --- parseScripts.js (uncompressed)

From Goto.js:

How can I use goto statement in nodejs?

There is no goto keyword in javascript. The reason being it provides a way to branch in an arbitrary and unstructured manner. This might make a goto statement hard to understand and maintain. But there are still other ways to get the desired result.
The method for getting the goto result in JavaScript is use of Break and Continue.

REFERENCE: https://www.geeksforgeeks.org/how-to-use-goto-in-javascript/

HTML JAVASCRIPT goto label?

JavaScript has NO goto statement, you can only use labels with the break or continue.

You can use a label to identify a loop, and then use the break or continue statements to indicate whether a program should interrupt the loop or continue its execution.

var i, j;
loop1:for (i = 0; i < 3; i++) {      //The first for statement is labeled "loop1"   loop2:   for (j = 0; j < 3; j++) {   //The second for statement is labeled "loop2"      if (i === 1 && j === 1) {         continue loop1;      }      log.innerHTML += ('i = ' + i + ', j = ' + j + "<br/>");   }}

<div id="log"> </div>

javascript: goto statement

Pretty sure you want to use continue;:

for (var rows = 0; rows < result.data.length; rows++)  {
    var row = result.data[rows];
    if (row[0] == "") {
        continue;  
    }
    // some code
}

javascript goto label how to use inside loop

You can use break to exit a for loop, or continue to go to the next loop iteration.

javascript has no goto statement:

A Statement may be prefixed by a label. Labelled statements are only used in conjunction with labelled break and continue statements. ECMAScript has no goto statement.

http://es5.github.io/#x12.12

How to use Goto statement in jquery?

There is no goto statement in js, but there are some workarounds. Using a labeled while works pretty good I think:

$("#PlaySnd").on('ended', function (e) { 
   start: while(true) {
     var crnt = $("img[src$='../Images/checked.png']");
     crnt.closest('tr').next().find('.chck').attr('src', '../Images/checked.png');
     crnt.attr('src', '../Images/Unchecked.png');
     crnt = $("img[src$='../Images/checked.png']");
     var thisword = crnt.parent().parent().children(0).children(0).html();
     if (/\s/.test(thisword)) {
        //alert('it has space');
        // here I would like to start code from the bigenning like this 
        continue start
        // because some words hase more than one word so it causes progrm stop so I need to move to the next one 
     }
     else {
         $("#PlaySnd").attr('src', 'https://ssl.gstatic.com/dictionary/static/sounds/oxford/' + thisword + '--_gb_1.mp3').trigger('play');
     } // end if
     break; // break when reaching end
   } // end start labeled while
 });

How to execute something similar to a goto statement in node js or how to create and call a function within an asynchronous function?

Declare a boolean variable that indicates whether you need to try again or not, and put the repeated functionality inside a while loop that checks that variable. If the x condition at the end of the loop is not fulfilled, set tryAgain to false, so that no further iterations occur:

(async function example() {
  const browser = await puppeteer.launch({headless: false})
  const page = await browser.newPage()
  let tryAgain = true;  // <--------------------------
  while (tryAgain) {    // <--------------------------
    /*-----------NEED TO COME BACK HERE-----------*/
    const tessProcess = utils.promisify(tesseract.process);
    await page.setViewport(viewPort)
    await page.goto('http://www.example.com')
    await page.screenshot(options)
    const text = await tessProcess('new.png');
    console.log(text.trim());
    await page.$eval('input[id=userEnteredCaptcha]', (el, value) => el.value = value, text.trim())
    await page.$eval('input[id=companyID]', el => el.value = 'val');
    const submitBtn = await page.$('[id="data"]');
    await submitBtn.click();

    try {
      var x =  await page.waitFor("#msgboxclose");
      console.log("Captcha error")
    }
    catch (e) {
      console.error('No Error');
    }
    if(x){
      await page.keyboard.press('Escape');
      /*---------GO FROM HERE--------*/
    } else {
      tryAgain = false;   // <--------------------------
    }
  }

})()

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