Add ellipses to overflowing text in SVG?

Question

I\'m using D3.js. I\'d like to find an SVG equivalent to this CSS class, which adds ellipses if text flows out of its containing div:

Answer 1

Just an update on the wrap function proposed by user2846569. getComputedTextLength() tends to be really slow, so...

EDIT

I diligently applied the advice by user2846569 and made a version with "binary" search, with some calibration and parametrized precision.

'use strict';

var width = 2560;

d3.select('svg').attr('width', width);

// From http://stackoverflow.com/questions/10726909/random-alpha-numeric-string-in-javascript
function randomString(length, chars) {
    var result = '';
    for (var i = length; i > 0; --i)
        result += chars[Math.floor(Math.random() * chars.length)];
    return result;
}

function wrap() {
    var self = d3.select(this),
        textWidth = self.node().getComputedTextLength(),    // Width of text in pixel.
        initialText = self.text(),                          // Initial text.
        textLength = initialText.length,                    // Length of text in characters.
        text = initialText,
        precision = 10, //textWidth / width,                // Adjustable precision.
        maxIterations = 100; // width;                      // Set iterations limit.

    while (maxIterations > 0 && text.length > 0 && Math.abs(width - textWidth) > precision) {

        text = /*text.slice(0,-1); =*/(textWidth >= width) ? text.slice(0, -textLength * 0.15) : initialText.slice(0, textLength * 1.15);
        self.text(text + '...');
        textWidth = self.node().getComputedTextLength();
        textLength = text.length;
        maxIterations--;
    }
    console.log(width - textWidth);
}

var g = d3.select('g');

g.append('text').append('tspan').text(function(d) {
    return randomString(width, 'a');
}).each(wrap);

View on JSFiddle.