Create indexes dynamically with javascript

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Good morning gentlemen,

I’m creating a system of contracts and I’m having a question of how to realize a certain idea.

How the contract works by closures and paragraphs, I need to add indexes dynamically.

The idea would be like this:

1 - Primeira Clausura.
1.1 - Primeiro paragrafo.
1.2 - Segundo Paragrafo
...

2 - Segunda Clausura.
2.1 - Primeiro paragrafo da segunda clausura.
2.2 - Segundo paragrafo da segunda clausura.
...

3 - Terceira Clausura.
3.1 - Terceiro paragrafo da Terceira clausura.
3.2 - STerceiro paragrafo da Terceira clausura.
...

I have a js function that adds these paragraphs through a textarea, that is to say it does not write to a database and receives nothing from a database, so if the user deletes the paragraph 2.1 for example, the paragraph 2.2 automatically becomes 2.1.

Good any idea already helps enough, I thank you! Hug!

javascript
  • 1

    If you do not use bank, where are you recording? Or if you can give more details, I did not understand the question right.

1 answer

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You can use a Regexp to find indexes and replace them in ascending order. It would be something like this:

var textarea = document.getElementById('contrato');
var clausulas = new RegExp('([0-9\.]+)\\s\\-', 'g');
textarea.addEventListener('keyup', function () {
    var texto = this.value;
    var currentIndex = 0;
    var subIndex = 0;
    this.value = texto.replace(clausulas, function (match) {
        if (match.indexOf('.') == -1) {
            currentIndex++;
            subIndex = 0;
            return currentIndex + ' -';
        }
        subIndex++;
        return [currentIndex, '.', subIndex, ' -'].join('');
    });
});

jsFiddle: http://jsfiddle.net/9hh5amko/

Javascript has a native function for substitutions. Passing it a function as a second parameter you can work each value found by regex.

Within the function separated into 2 types. Those who have . (subIndex) and what they don’t have (currentIndex) and this way they increase leaving everything ordered.

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