替换html textarea中的文本

Question

I have this script that matches a text on keyup in a textarea if between the minus sign.

    $('#notes').keyup(function() { // notes is the id of the textarea
        var regex = /\-([^\)]+)\-/gmi; // it gets the text between minus sign. Example: -text-
        var myValue = $(this).val();
        if(myValue.match(regex)){
            var reference = myValue.match(regex);
            $.ajax({
                async: false, 
                type: "POST",
                url: "scripts/script.php",
                data: { "reference" : reference },
                success: function(data) {   
                    // I need to replace the text matched by the regex with data in the textarea.
                    // I need to stop the ajax calling after success or call it only if regex is matched
                }
            }); 
        }
    });

When text is matched by the regex it send an ajax post call to a script that search the world in a database and returns a definition. I need to replace the text matched by the regex with data, the definition extracted by the database.

Additionally I'd like to launch the ajax POST call only if regex is matched. It works just the first time. After first match it still sending the call for each keyup.

Answer 1

Try the below code.

var triggerTime;
$("#notes").keyup(function() { // notes is the id of the textarea
        clearTimeout(triggerTime);
        var myValue = $(this).val();
        triggerTime = setTimeout(function(){
            var regex = /\-([^\)]+)\-/gmi; // it gets the text between minus sign. Example: -text-
            if(myValue.match(regex)){
                var reference = myValue.match(regex);
                $.ajax({
                    async: false, 
                    type: "POST",
                    url: "scripts/script.php",
                    data: { "reference" : reference },
                    success: function(data) {   
                        // I need to replace the text matched by the regex with data in the textarea.
                        // I need to stop the ajax calling after success or call it only if regex is matched
                    }
                }); 
            }
        }, 3000);// Call request in 3 second
    });

This is the optimized version of your code. it will wait for users to complete, and in inactivity of 3 seconds, it will generate an Ajax call.

you can change the frequency to 2000 OR 1000 (2 second and 1 second respectively).

Answer 2

I solved the problem adding contenteditable="true" to the textarea. Below the final jquery code:

    var textInput = $("#notes"); // the ID of the textarea
    var triggerTime;
    $("#notes").keyup(function() { // notes is the id of the textarea
        clearTimeout(triggerTime);
        var myValue = $(this).text();
        triggerTime = setTimeout(function(){
            var regex = /\-([^\)]+)\-/gmi; // it gets the text between minus sign. Example: -text-
            if(myValue.match(regex)){
                var newValue;
                var reference = myValue.match(regex);
                $.ajax({
                    async: false, 
                    type: "POST",
                    url: "scripts/parser.php",
                    data: { "reference" : reference },
                    success: function(data) {       
                        newValue = data;    
                        console.log(newValue);
                        $('.textarea').html(function() {
                            return $(this).text().replace(reference[0], '<strong>' + newValue + '</strong>');
                        });
                    }
                }); 
            }
        }, 1000);// Call request in 1 second
    });