SVG direction attribute and BIDI

Issue #12133259 • Assigned to Bogdan B.


Gerald R.
May 25, 2017
This issue is public.
Found in
  • Microsoft Edge
Found in build #
Reported by 2 people

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Steps to reproduce

SVG does not handle the text-anchor correctly. That has been an open for two years. See bug 101323 that just addresses “start” value.

In addition to that problem, SVG does not follow the direction attribute.

Insert the following block into an HTML file (or used attached SVG directly):

   <svg width="1000" height="400" xmlns="">
    <rect x="0" y="0" width="1000" height="400" fill="cyan"></rect>
    <line x1="500" x2="500" y1="0" y2="400" stroke-width="1" stroke="blue"></line>

    <text x="500" y="50">ABCD</text>
    <text x="500" y="75" direction="rtl">ABCD</text>

    <text x="500" y="100" direction="ltr" text-anchor="start">نص المرساة 15 kg.</text>
    <text x="500" y="125" direction="ltr" text-anchor="middle">نص المرساة 15 kg.</text>
    <text x="500" y="150" direction="ltr" text-anchor="end">نص المرساة 15 kg.</text>

    <text x="500" y="175" direction="rtl" text-anchor="start">نص المرساة 15 kg.</text>
    <text x="500" y="200" direction="rtl" text-anchor="middle">نص المرساة 15 kg.</text>
    <text x="500" y="225" direction="rtl" text-anchor="end">نص المرساة 15 kg.</text>

    <text x="500" y="250" writing-mode="rl" direction="rtl" text-anchor="start">نص المرساة 15 kg.</text>
    <text x="500" y="275" writing-mode="rl" direction="rtl" text-anchor="middle">نص المرساة 15 kg.</text>
    <text x="500" y="300" writing-mode="rl" direction="rtl" text-anchor="end">نص المرساة 15 kg.</text>

    <text x="500" y="325" style="direction: rtl;" text-anchor="start">نص المرساة 15 kg.</text>
    <text x="500" y="350" style="direction: rtl;" text-anchor="middle">نص المرساة 15 kg.</text>
    <text x="500" y="375" style="direction: rtl;" text-anchor="end">نص المرساة 15 kg.</text>

Note the Arabic text is rendered ltr in the text editor, so it will always show the “kg” at the end of a sentence. The “15” appears at the start of the string, but it is the middle.

The first two lines are laid out ltr and rtl respectively. The first should extend to the right, and the second should extend to the left. This shows the two year bug about text-anchor. BIDI correctly orders the ltr-dominant "ABCD".

The next three lines of the SVG should be rendered ltr. BIDI sees the Arabic text and temporarily switches to rtl; the “15” is made of neutral chars, so it attaches to the Arabic; it is rendered ltr but placed to the left as continued rtl; the “kg” are ltr-dominant so they resume the block’s normal ltr and are placed to the right.

The last 9 lines are hopelessly confused. All text elements are rtl, so the “kg” should always be to the left. The text-anchor “start” text is readable but on the wrong side. The text-anchor “middle” and “end” overwrite text and are look wrong. These strings should all look something like:

. kg 15 (rtl Arabic text)

Chrome displays the SVG correctly.

For comparison, within HTML, Edge follows the dir attribute and does BIDI correctly. You can insert these strings in p elements with dir="rtl" and get the correct/Chrome result.

Please see other feedbacks in userfeedback VSO for feedbacks that are tracked by this work item.

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        This Bug was created from feedback triage by v-shzoha


Report Details

        Feedback Details




        svg text direction and text-anchor issues in edge and explorer



        We use d3 for our charts, and have serious issues with rendering <text> in IE and Edge. These issues cause overlapping of texts, to the point that they are not readable. When we had <text> that combined Hebrew and English content that looked corrupted, we found out that the problem is both in the rendering of text direction and text-anchor. I have researched it and it seems that there are confirmed bugs about this on the Microsoft for developers page (see bellow the links). 

Is there an ETA for these issues? as this is impacting our product.

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        UIF\Microsoft Edge\Website issues


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Comments and activity

  • Microsoft Edge Team

    Changed Assigned To to “James M.”

    Changed Assigned To to “Bogdan B.”

    Changed Assigned To from “Bogdan B.” to “Saqib A.”

    Changed Status to “Confirmed”

    Changed Assigned To from “Saqib A.” to “Francois R.”

    Changed Steps to Reproduce

    Changed Assigned To from “Francois R.” to “Bogdan B.”

    Changed Status from “Confirmed” to “Won’t fix”

    Changed Status from “Won’t fix”

  • Reactivating auto-resolved valid bugs reported by web dev community. Those were not expected to be resolved. We apologize for any inconvenience!

  • Microsoft Edge Team

    Changed Assigned To to “Bogdan B.”

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