JavaScript: String in the source code over more than one line

You can do this in JavaScript, by easily connecting long strings with a plus sign. So something like this:

alert('This is a long string ' +
'running over ' +
'multiple lines');

With this, you can definitely get what you want. Why it is not working with the newlines from your example, I do not know. Of course, unfortunately, the plus sign method is much more complicated than this.
Last update on 2022-03-15 | Created on 2012-04-25

In JavaScript, you have to specify a line break in a string with \n. Therefore, "real line breaks" created by pressing the enter key on the keyboard are not possible in strings and that is exactly the thing, you have tried in your example above.

In PHP, this is different. Here you can also press the enter key to create a line break within a string. If the string is outputed using echo, of course, the line break will only be visible in the source code, since in HTML, only <br>, <p> and so on are displayed as a real line break also on the website.

To come back to your example. There are two possibilities:

// first possibility
alert('This is a ' +
'long string');
 
// second possibility
alert('This is a \
long string');

Either you do it, as proposed by PlasmaTV, with connecting several strings together, or you write a backslash at the end of each line. The first option is preferable, because the second option is possibly not supported by each browser.
Last update on 2022-03-15 | Created on 2012-04-26