Trimming text to a given pixel width in SVG

Question

I\'m drawing text labels in SVG. I have a fixed width available (say 200px). When the text is too long, how can I trim it ?

The ideal solution would also add ellipsis (.

Answer 1

Try this one, I use this function in my chart library:

function textEllipsis(el, text, width) {
  if (typeof el.getSubStringLength !== "undefined") {
    el.textContent = text;
    var len = text.length;
    while (el.getSubStringLength(0, len--) > width) {}
    el.textContent = text.slice(0, len) + "...";
  } else if (typeof el.getComputedTextLength !== "undefined") {
    while (el.getComputedTextLength() > width) {
      text = text.slice(0,-1);
      el.textContent = text + "...";
    }
  } else {
    // the last fallback
    while (el.getBBox().width > width) {
      text = text.slice(0,-1);
      // we need to update the textContent to update the boundary width
      el.textContent = text + "...";
    }
  }
}