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Showing content from https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/textAlign below:

CanvasRenderingContext2D: textAlign property - Web APIs

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The CanvasRenderingContext2D.textAlign property of the Canvas 2D API specifies the current text alignment used when drawing text.

The alignment is relative to the x value of the fillText() method. For example, if textAlign is "center", then the text's left edge will be at x - (textWidth / 2).

Possible values:

"left"

The text is left-aligned.

"right"

The text is right-aligned.

"center"

The text is centered.

"start"

The text is aligned at the normal start of the line (left-aligned for left-to-right locales, right-aligned for right-to-left locales).

"end"

The text is aligned at the normal end of the line (right-aligned for left-to-right locales, left-aligned for right-to-left locales).

The default value is "start".

This example demonstrates the three "physical" values of the textAlign property: "left", "center", and "right".

<canvas id="canvas"></canvas>

const canvas = document.getElementById("canvas");
canvas.width = 350;
const ctx = canvas.getContext("2d");
const x = canvas.width / 2;

ctx.beginPath();
ctx.moveTo(x, 0);
ctx.lineTo(x, canvas.height);
ctx.stroke();

ctx.font = "30px serif";

ctx.textAlign = "left";
ctx.fillText("left-aligned", x, 40);

ctx.textAlign = "center";
ctx.fillText("center-aligned", x, 85);

ctx.textAlign = "right";
ctx.fillText("right-aligned", x, 130);

This example demonstrates the two direction-dependent values of the textAlign property: "start" and "end". Note that the direction property is manually specified as "ltr", although this is also the default for English-language text.

<canvas id="canvas"></canvas>

const canvas = document.getElementById("canvas");
const ctx = canvas.getContext("2d");

ctx.font = "30px serif";
ctx.direction = "ltr";

ctx.textAlign = "start";
ctx.fillText("Start-aligned", 0, 50);

ctx.textAlign = "end";
ctx.fillText("End-aligned", canvas.width, 120);

• The interface defining this property: CanvasRenderingContext2D

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