# button The **** component includes capsule, circle, text, arc, and download buttons. ## Child Components Not supported ## Attributes In addition to the attributes in [Universal Attributes](js-components-common-attributes.md), the following attributes are supported.

Name	Type	Default Value	Mandatory	Description
type	string	-	No	Dynamic modification is not supported. If this attribute is not set, capsule-like buttons are displayed. Different from the capsule button, the four rounded corners of a capsule-like button can be configured using border-radius. Available button types are as follows: capsule: a capsule button with fillets, background color, and text circle: a circle button which can be used to place icons text: a text button which displays the text only arc: an arc button. This value is applicable to wearables only. download: a download button. The download progress bar is added. This value is applicable to smart TVs and smartphones.
value	string	-	No	Text value of the button.
icon	string	-	No	Path of the button icon. The supported icon formats are JPG, PNG, and SVG.
placement⁵⁺	string	end	No	Position of the button icon in text. This attribute is valid only when type is not set. Available values are as follows: start: The button icon is at the beginning of the text. end: The button icon is at the end of the text. top: The button icon is at the top of the text. bottom: The button icon is at the bottom of the text.
waiting	boolean	false	No	Waiting status. When waiting is set to true, the waiting transition is displayed on the left of the text. This attribute is unavailable for download buttons and wearables.

## Styles ### When the Button Type Is Not **arc** In addition to the styles in [Universal Styles](js-components-common-styles.md), the following styles are supported.

Name	Type	Default Value	Mandatory	Triggered when
text-color	<color>	#ff007dff	No	Text color of the button.
font-size	<length>	16px	No	Font size of the button.
allow-scale	boolean	true	No	Whether the font size changes with the system's font size settings. NOTE: If the config-changes tag of fontSize is configured for abilities in the config.json file, the setting takes effect without application restart.
font-style	string	normal	No	Font style of the button.
font-weight	number \| string	normal	No	Font weight of the button. For details, see font-weight of the text component.
font-family	<string>	sans-serif	No	Font family, in which fonts are separated by commas (,). Each font is set using a font name or font family name. The first font in the family or the font specified by Custom Font Styles is used for the text.
icon-width	<length>	-	No	Width of the internal icon of a circle button. The entire circle button is filled by default. NOTE: This style must be set when the icon uses the SVG image.
icon-height	<length>	-	No	Height of the internal icon of a circle button. The entire circle button is filled by default. NOTE: This style must be set when the icon uses the SVG image.
radius	<length>	-	No	Button radius. For a circle button, this style takes precedence over width and height in the common styles.

>![](../../public_sys-resources/icon-note.gif) **NOTE:** >- For capsule buttons, border-related styles are not supported. >- For circle buttons, text-related styles are not supported. >- For text buttons, the text size is automatically adaptive, and **radius**, **width**, and **height** cannot be set. The **background-color** style is not supported when the background is completely transparent. ### When the Button Type Is **arc** In addition to the **background-color**, **opacity**, **display**, **visibility**, **position**, **\[left|top****|right|bottom** styles in [Universal Styles](js-components-common-styles.md), the following styles are supported.

Name	Type	Default Value	Mandatory	Triggered when
text-color	<color>	#de0000	No	Text color of the arc button.
font-size	<length>	37.5px	No	Font size of the arc button.
allow-scale	boolean	true	No	Whether the font size changes with the system's font size settings.
font-style	string	normal	No	Font style of the arc button.
font-weight	number \| string	normal	No	Font weight of the arc button. For details, see font-weight of the text component.
font-family	<string>	sans-serif	No	Font family, in which fonts are separated by commas (,). Each font is set using a font name or font family name. The first font in the family or the font specified by Custom Font Styles is used for the text.

## Events Events in [Universal Events](js-components-common-events.md) are supported. ## Methods Methods in [Universal Methods](js-components-common-methods.md) are supported. When the button type is **download**, the following methods are supported.

Name	Parameter	Triggered when
setProgress	{ progress:percent }	Progress bar of the download button. The value ranges from 0 to 100. The progress bar is displayed if the value is greater than 0. If the value is greater than or equal to 100, the progress bar is not displayed. NOTE: The text displayed on the progress bar is changed based on the value.

## Example ```

``` ``` /* xxx.css */ .div-button { flex-direction: column; align-items: center; } .first{ background-color: #F2F2F2; text-color: #0D81F2; } .button { margin-top: 15px; } .last{ background-color: #F2F2F2; text-color: #969696; margin-top: 15px; width: 280px; height:72px; } .button:waiting { width: 280px; } .circle { background-color: #007dff; radius: 72px; icon-width: 72px; icon-height: 72px; } .text { text-color: red; font-size: 40px; font-weight: 900; font-family: sans-serif; font-style: normal; } .download { width: 280px; text-color: white; background-color: #007dff; } ``` ``` // xxx.js export default { data: { count: 5, downloadText: "Download" }, progress(e) { this.count+= 10; this.downloadText = this.count+ "%"; this.$element('download-btn').setProgress({ progress: this.count}); if (this.count>= 100) { this.downloadText = "Done"; } } } ``` ![](figures/1.png)