Asked  7 Months ago    Answers:  5   Viewed   24 times

Say a web page has a string such as "I am a simple string" that I want to find. How would I go about this using JQuery?

 Answers

21

jQuery has the contains method. Here's a snippet for you:

<script type="text/javascript">
$(function() {
    var foundin = $('*:contains("I am a simple string")');
});
</script>

The selector above selects any element that contains the target string. The foundin will be a jQuery object that contains any matched element. See the API information at: https://api.jquery.com/contains-selector/

One thing to note with the '*' wildcard is that you'll get all elements, including your html an body elements, which you probably don't want. That's why most of the examples at jQuery and other places use $('div:contains("I am a simple string")')

Tuesday, June 1, 2021
 
LaKaede
answered 7 Months ago
28

You can use replace() with html():

var html = $('p').html();
$('p').html(html.replace(/world/gi, '<strong>$&</strong>'));

Edit: http://jsbin.com/AvUcElo/1/edit

I turned it into a lil' plugin, here:

$.fn.wrapInTag = function(opts) {

  var tag = opts.tag || 'strong'
    , words = opts.words || []
    , regex = RegExp(words.join('|'), 'gi') // case insensitive
    , replacement = '<'+ tag +'>$&</'+ tag +'>';

  return this.html(function() {
    return $(this).text().replace(regex, replacement);
  });
};

// Usage
$('p').wrapInTag({
  tag: 'em',
  words: ['world', 'red']
});
Tuesday, June 8, 2021
 
Gregosaurus
answered 6 Months ago
32

There is a plug-in that can get the cursor's position within a text area. This could be utilized to insert text at that designated position.

Friday, August 6, 2021
 
diegoiglesias
answered 4 Months ago
45

You can use either of these plugins:

  • TextAreaExpander (Demo)
  • autoResize Plugin
Friday, October 1, 2021
 
Don
answered 2 Months ago
Don
69

I think I finally got it...

What it does:

  • It goes through the OldFile.txt content, searching for markers, if found they are stored into environment variables to be used in the nest step (e.g. for _PWD marker (variable) which has a value of Pword=, it will create a _PWDCONTENTS variable with the content of Pword=ABC).
  • It goes through File.txt content, searching for the same markers, if one marker found, the corresponding CONTENTS variable is dumped in the OutFile.txt, else the original line. Because that happens in the inner for loop, I had to add some extra logic (the _WROTE var) to avoid writing the same lines more than once.

Notes:

  • It is supposed (well, besides doing what it's supposed to) to be "configurable" (the code is complicated, it's heading towards meta :) if you will), meaning that if there are changes between the markers the code shouldn't change (well there would be code changes, but not in the functional part only in variable definitions). Let me detail:

    • If you no longer need to replace the Town= string, then all you have to do is removing _TOWN from _ALL: set _ALL=_PWD _ACCT _POST _LOC.
    • The reverse: if you want to add some other tag (let's call it Name), you have to create a new environment variable: set _NAME=Name= and add it to _ALL: set _ALL=_PWD _ACCT _TOWN _POST _LOC _NAME.
  • As an indirect consequence, I didn't focus on performance, so it might run slow. Anyway I tried to keep the disk accesses (which are painfully slow) to a minimum (one example is when having 2 for loops the one that iterates on a file contents - assuming that each iteration takes a disk access; this might not be true, and Win has IO buffering - it's the outer one).

  • I "commented" out the last line in the file, to avoid overwriting the original file. If that behavior is needed, simply remove the rem at the beginning.

Here's the batch code:

@echo off
setlocal enabledelayedexpansion

set _INFILE="File.txt"
set _OUTFILE="NewFile.txt"
set _OLDFILE="OldFile.txt"


set _PWD=Pword=
set _ACCT=Account=
set _TOWN=Town=
set _POST=Postcode=
set _LOC=LocationChanged=
set _ALL=_PWD _ACCT _TOWN _POST _LOC

echo Parsing old file contents...

for /f "tokens=*" %%f in ('type !_OLDFILE!') do (
    for %%g in (!_ALL!) do (
        echo %%f | findstr /b /c:!%%g! 1>nul
        if "!errorlevel!" equ "0" (
            set %%gCONTENTS=%%f
        )
    )
)

copy nul %_OUTFILE%
echo Merging the old file contents into the new file...
set _WROTE=0

for /f "tokens=*" %%f in ('findstr /n "^^" !_INFILE!') do (
    set _TMPVAR0=%%f
    set _TMPVAR0=!_TMPVAR0:*:=!
    for %%g in (!_ALL!) do (
        echo !_TMPVAR0! | findstr /b /c:!%%g! 1>nul
        if "!errorlevel!" equ "0" (
            echo.!%%gCONTENTS!>>!_OUTFILE!
            set _WROTE=1
        )
    )
    if "!_WROTE!" equ "0" (
        echo.!_TMPVAR0!>>!_OUTFILE!
    ) else (
        set _WROTE=0
    )
)

rem copy /-y %_OUTFILE% %_INFILE%

@EDIT0: Using @StevoStephenson suggestion (as part of the question snippet), I replaced the (2nd) outer for loop to ('findstr /n "^^" !_INFILE!') in order to include the empty lines, so the 3rd remark no longer applies (deleting). Also did some small changes to allow files that contain SPACE s in their paths.

Wednesday, November 10, 2021
 
THEK
answered 3 Weeks ago
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