- Qt 5.5
- Qt WebEngine Widgets
- C++ Classes
- QWebEngineScript
- Qt 5.5.1 Reference Documentation

# QWebEngineScript Class

The QWebEngineScript class encapsulates a JavaScript program. More...

Header: | #include <QWebEngineScript>
qmake: | QT += webenginewidgets
Since: | Qt 5.5

- List of all members, including inherited members

## Public Types

enum | InjectionPoint { DocumentCreation, DocumentReady, Deferred }
enum | ScriptWorldId { MainWorld, ApplicationWorld, UserWorld }

## Public Functions

| QWebEngineScript()
| QWebEngineScript(const QWebEngineScript & other)
| ~QWebEngineScript()
InjectionPoint | injectionPoint() const
bool | isNull() const
QString | name() const
bool | runsOnSubFrames() const
void | setInjectionPoint(InjectionPoint p)
void | setName(const QString & scriptName)
void | setRunsOnSubFrames(bool on)
void | setSourceCode(const QString & scriptSource)
void | setWorldId(quint32 id)
QString | sourceCode() const
void | swap(QWebEngineScript & other)
quint32 | worldId() const
bool | operator!=(const QWebEngineScript & other) const
QWebEngineScript & | operator=(const QWebEngineScript & other)
bool | operator==(const QWebEngineScript & other) const

## Detailed Description

The QWebEngineScript class encapsulates a JavaScript program.

QWebEngineScript allows the programmatic injection of so called "user scripts" in the javascript engine at different points, determined by injectionPoint(), during the loading of web contents.

Scripts can be executed either in the main javascript world, along with the rest of the JavaScript coming from the web contents, or in their own isolated world. While the DOM of the page can be accessed from any world, JavaScript variables a function defined in one world are not accessible from a different one. ScriptWorldId provides some predefined ids for this purpose.

## Member Type Documentation

### enum QWebEngineScript::InjectionPoint

This enum describes the timing for when the script injection should happen.

Constant | Value | Description
--- | --- | ---
`QWebEngineScript::DocumentCreation` | `2` | The script will be executed as soon as the document is created. This is not suitable for any DOM operation.
`QWebEngineScript::DocumentReady` | `1` | The script will run as soon as the DOM is ready. This is equivalent to the DOMContentLoaded event firing in JavaScript.
`QWebEngineScript::Deferred` | `0` | The script will run when the page load finishes, or 500ms after the document is ready, whichever comes first.

### enum QWebEngineScript::ScriptWorldId

This enum provides pre defined world ids for isolating user scripts into different worlds.

Constant | Value | Description
--- | --- | ---
`QWebEngineScript::MainWorld` | `0` | The world used by the page's web contents. It can be useful in order to expose custom functionality to web contents in certain scenarios.
`QWebEngineScript::ApplicationWorld` | `1` | The default isolated world used for application level functionality implemented in JavaScript.
`QWebEngineScript::UserWorld` | `2` | The first isolated world to be used by scripts set by users if the application is not making use of more worlds. As a rule of thumbs, if that functionality is exposed to the application users, each individual script should probably get its own isolated world.

## Member Function Documentation

### QWebEngineScript::QWebEngineScript()

QWebEngineScript::QWebEngineScript

Constructs a null script.

### QWebEngineScript::QWebEngineScript(const QWebEngineScript & other)

QWebEngineScript::isNull Returns `true` is the script is null, `false` otherwise.

### QWebEngineScript::~QWebEngineScript()

### InjectionPoint QWebEngineScript::injectionPoint() const

QWebEngineScript::injectionPoint Returns the point in the loading process at which the script will be executed. The default value is QWebEngineScript::Deferred.

See also setInjectionPoint.

### bool QWebEngineScript::isNull() const

### QString QWebEngineScript::name() const

QWebEngineScript::name Returns The name of the script. Can be useful to retrieve a given script from a QWebEngineScriptCollection.

See also setName(), QWebEngineScriptCollection::findScript(), and QWebEngineScriptCollection::findScripts().

### bool QWebEngineScript::runsOnSubFrames() const

QWebEngineScript::runsOnSubFrames Returns `true` if the script is executed on every frame in the page, `false` if it is only ran for the main frame.

See also setRunsOnSubFrames().

### void QWebEngineScript::setInjectionPoint(InjectionPoint p)

QWebEngineScript::setInjectionPoint p Sets the point at which to execute the script to be `\p`.

See also injectionPoint() and QWebEngineScript::InjectionPoint.

### void QWebEngineScript::setName(const QString & scriptName)

QWebEngineScript::setName scriptName

Sets the script name to scriptName.

See also name().

### void QWebEngineScript::setRunsOnSubFrames(bool on)

QWebEngineScript::setRunsOnSubFrames on Sets whether or not the script is executed on sub frames in addition to the main frame.

See also runsOnSubFrames().

### void QWebEngineScript::setSourceCode(const QString & scriptSource)

QWebEngineScript::setSourceCode scriptSource Sets the script source to scriptSource.

See also sourceCode().

### void QWebEngineScript::setWorldId(quint32 id)

QWebEngineScript::setWorldId id Sets the world id of the isolated world to use when running this script.

See also worldId().

### QString QWebEngineScript::sourceCode() const

QWebEngineScript::sourceCode Returns the source of the script.

See also setSourceCode().

### void QWebEngineScript::swap(QWebEngineScript & other)

### quint32 QWebEngineScript::worldId() const

QWebEngineScript::worldId Returns the world id defining which world the script is executed in.

See also setWorldId().

### bool QWebEngineScript::operator!=(const QWebEngineScript & other) const

### QWebEngineScript & QWebEngineScript::operator=(const QWebEngineScript & other)

### bool QWebEngineScript::operator==(const QWebEngineScript & other) const

QWebEngineScript::operator == other Returns `true` if this QWebEngineScript is equal to other, otherwise returns `false`.