How to create a JSON representation of a Line object using FabricJS?-JS Tutorial-php.cn

如何使用 FabricJS 创建 Line 对象的 JSON 表示？

In this tutorial, we will learn how to create a JSON representation of a Line object using FabricJS. Line element is one of the basic elements provided in FabricJS. It is used to create straight lines. Since line elements are geometrically one-dimensional and contain no interiors, they are never filled. We can create a line object by creating an instance offabric.Line, specifying the x and y coordinates of the line and adding it to the canvas. To create a JSON representation of a Line object, we use thetoJSONmethod.

Syntax

toJSON(propertiesToInclude: Array): Object

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Parameters

##propertiesToInclude- This parameter accepts an array containing our Any attributes you might want are additionally included in the output. This parameter is optional.

Use

toJSONmethod

Example

Let's look at a code example to see the output logged when using the

toJSONmethod. exist In this case, a JSON representation of the line instance is returned.

Using the toJSON method

You can open console from dev tools and see that the logged output contains the JSON representation of the line instance

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Add other properties using the

toJSONmethod

Example

Let's look at a code example to see how to include additional properties using the

toJSONmethod. In this example, we added a custom property called "name". We can pass specific properties to the fabric.Line instance as the second parameter in the options object and pass the same keys to thetoJSONmethod.

Using toJSON method to add additional properties

You can open console from dev tools and see that the logged output contains added property called name

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