wv-element🔗ℹ

constructor (new wv-element%         [window window]         [element-id element-id])

→ (is-a?/c wv-element%)

window : (is-a?/c wv-window%)

element-id : symbol?

Creates an element wrapper.

window is the owning window object. element-id is the DOM element identifier used in calls to the lower-level DOM manipulation functions.

method (send a-wv-element id) → symbol?

Returns the element id.

method (send a-wv-element add-event-callback!   evt             cb)   →   void?

evt : symbol?

cb : procedure?

Associates cb with evt.

If a callback was already stored for evt, it is replaced.

method (send a-wv-element remove-event-callback! evt) → void?

evt : symbol?

Removes the callback associated with evt, if any.

method (send a-wv-element event-callback-count) → exact-integer?

Returns the number of registered event callbacks.

method (send a-wv-element dispatch-event evt data)

→ (or/c 'wv-unhandled-js-event 'wv-handled-js-event)

evt : symbol?

data : any/c

Dispatches an event to the callback registered for evt.

If no callback is registered, the method returns 'wv-unhandled-js-event.

If a callback is found, it is invoked as:

(cb this evt data)

and the method returns 'wv-handled-js-event.

method (send a-wv-element set-innerHTML! html) → (is-a?/c wv-element%)

html : (or/c string? xexpr?)

Sets the innerHTML of this element using JavaScript and returns this element.

The operation delegates to:

(webview-set-innerHTML! wv element-id html)

method (send a-wv-element add-class! cl) → any/c

cl : (or/c symbol? string? list?)

Adds one or more CSS classes to this element.

The accepted values follow the contract of webview-add-class!. The operation delegates to:

(webview-add-class! wv element-id cl)

method (send a-wv-element remove-class! cl) → any/c

cl : (or/c symbol? string? list?)

Removes one or more CSS classes from this element.

The accepted values follow the contract of webview-remove-class!. The operation delegates to:

(webview-remove-class! wv element-id cl)

method (send a-wv-element display d ...) → any/c

d : (or/c symbol? string?)

Gets or sets the CSS display property of this element.

If no argument is supplied, the current value is returned by delegating to:

(webview-get-style wv element-id 'display)

If an argument is supplied, only the first argument is used. The value may be a symbol or string and is converted internally before being passed to webview-set-style!.

The resulting style value is then read back and returned.

method (send a-wv-element visibility v ...) → any/c

v : (or/c symbol? string?)

Gets or sets the CSS visibility property of this element.

If no argument is supplied, the current value is returned by delegating to:

(webview-get-style wv element-id 'visibility)

If an argument is supplied, only the first argument is used. The value may be a symbol or string and is converted internally before being passed to webview-set-style!.

The resulting style value is then read back and returned.

method (send a-wv-element set-style! styles) → any/c

styles : (or/c kv? list-of-kv?)

Sets one or more inline style properties on this element.

The accepted values follow the contract of webview-set-style!. The method delegates to:

(webview-set-style! wv element-id styles)

method (send a-wv-element unset-style! styles) → any/c

styles : (or/c symbol? list-of-symbol?)

Clears one or more inline style properties on this element.

The accepted values follow the contract of webview-unset-style!. The method delegates to:

(webview-unset-style! wv element-id styles)

method (send a-wv-element set-attr! attr-entries) → any/c

attr-entries : (or/c kv? list-of-kv?)

Sets one or more attributes on this element.

The accepted values follow the contract of webview-set-attr!. The method delegates to:

(webview-set-attr! wv element-id attr-entries)

method (send a-wv-element attr attr) → (or/c string? boolean?)

attr : (or/c symbol? string?)

Returns the value of the attribute identified by attr.

The result follows the contract of webview-attr. If the underlying JavaScript result is null, the lower layer returns #f.

The method delegates to:

(webview-attr wv element-id attr)

method (send a-wv-element attr/number attr) → (or/c number? #f)

attr : (or/c symbol? string?)

Returns the attribute value converted to a number.

The method delegates to:

(webview-attr/number wv element-id attr)

method (send a-wv-element attr/symbol attr) → (or/c symbol? #f)

attr : (or/c symbol? string?)

Returns the attribute value converted to a symbol.

The method delegates to:

(webview-attr/symbol wv element-id attr)

method (send a-wv-element attr/boolean attr) → (or/c boolean? #f)

attr : (or/c symbol? string?)

Returns the attribute value converted to a boolean.

The method delegates to:

(webview-attr/boolean wv element-id attr)

method (send a-wv-element attr/date attr) → any/c

attr : (or/c symbol? string?)

Returns the attribute value converted to a date.

The method delegates to:

(webview-attr/date wv element-id attr)

method (send a-wv-element attr/time attr) → any/c

attr : (or/c symbol? string?)

Returns the attribute value converted to a time.

The method delegates to:

(webview-attr/time wv element-id attr)

method (send a-wv-element attr/datetime attr) → any/c

attr : (or/c symbol? string?)

Returns the attribute value converted to a datetime.

The method delegates to:

(webview-attr/datetime wv element-id attr)