The distance from the horizontal line indicated by the textBaseline attribute to the bottom of the bounding rectangle of the given text, in CSS pixels; positive numbers indicating a distance going down from the given baseline.
Property of apis/canvas/TextMetricsapis/canvas/TextMetrics
SyntaxNote: This property is read-only.
var result = TextMetrics.actualBoundingBoxDescent;
Return Value
Returns an object of type NumberNumber
Examples<canvas id="myCanvas" width="300" height="150" style="border:1px solid blue;"></canvas>
<p>. . .</p>
<script>
var can = document.getElementById("myCanvas");
var ctxt = can.getContext("2d");
ctxt.font = "24px Arial";
var txt = "Hello world!"
ctxt.fillText(txt, 10, 75);
var mets = ctxt.measureText(txt);
alert("actualBoundingBoxDescent: " + mets.actualBoundingBoxDescent);
</script>
Related specifications
Microsoft Developer Network: Windows Internet Explorer API reference Article
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