#[repr(transparent)]
pub struct JsString { /* fields omitted */ }
The length property of a String object indicates the length of a string,
in UTF-16 code units.
MDN documentation
The String object's charAt()
method returns a new string consisting of
the single UTF-16 code unit located at the specified offset into the
string.
MDN documentation
The charCodeAt()
method returns an integer between 0 and 65535
representing the UTF-16 code unit at the given index (the UTF-16 code
unit matches the Unicode code point for code points representable in a
single UTF-16 code unit, but might also be the first code unit of a
surrogate pair for code points not representable in a single UTF-16 code
unit, e.g. Unicode code points > 0x10000). If you want the entire code
point value, use codePointAt()
.
Returns NaN
if index is out of range.
MDN documentation
The codePointAt()
method returns a non-negative integer that is the
Unicode code point value.
MDN documentation
The concat()
method concatenates the string arguments to the calling
string and returns a new string.
MDN documentation
The endsWith() method determines whether a string ends with the characters of a
specified string, returning true or false as appropriate.
MDN documentation
The static String.fromCharCode() method returns a string created from
the specified sequence of UTF-16 code units.
MDN documentation
There are a few bindings to from_char_code
in js-sys
: from_char_code1
, from_char_code2
, etc...
with different arities.
The static String.fromCodePoint() method returns a string created by
using the specified sequence of code points.
MDN documentation
A RangeError is thrown if an invalid Unicode code point is given
There are a few bindings to from_code_point
in js-sys
: from_code_point1
, from_code_point2
, etc...
with different arities.
The includes()
method determines whether one string may be found
within another string, returning true or false as appropriate.
MDN documentation
The indexOf()
method returns the index within the calling String
object of the first occurrence of the specified value, starting the
search at fromIndex. Returns -1 if the value is not found.
MDN documentation
The lastIndexOf()
method returns the index within the calling String
object of the last occurrence of the specified value, searching
backwards from fromIndex. Returns -1 if the value is not found.
MDN documentation
The localeCompare() method returns a number indicating whether
a reference string comes before or after or is the same as
the given string in sort order.
MDN documentation
The match() method retrieves the matches when matching a string against a regular expression.
MDN documentation
The normalize() method returns the Unicode Normalization Form
of a given string (if the value isn't a string, it will be converted to one first).
MDN documentation
The padEnd()
method pads the current string with a given string
(repeated, if needed) so that the resulting string reaches a given
length. The padding is applied from the end (right) of the current
string.
MDN documentation
The padStart()
method pads the current string with another string
(repeated, if needed) so that the resulting string reaches the given
length. The padding is applied from the start (left) of the current
string.
MDN documentation
The repeat() method constructs and returns a new string which contains the specified
number of copies of the string on which it was called, concatenated together.
MDN documentation
The replace() method returns a new string with some or all matches of a pattern
replaced by a replacement. The pattern can be a string or a RegExp, and
the replacement can be a string or a function to be called for each match.
Note: The original string will remain unchanged.
MDN documentation
The search() method executes a search for a match between
a regular expression and this String object.
MDN documentation
The slice()
method extracts a section of a string and returns it as a
new string, without modifying the original string.
MDN documentation
The split() method splits a String object into an array of strings by separating the string
into substrings, using a specified separator string to determine where to make each split.
MDN documentation
The startsWith()
method determines whether a string begins with the
characters of a specified string, returning true or false as
appropriate.
MDN documentation
The substring()
method returns the part of the string between the
start and end indexes, or to the end of the string.
MDN documentation
The substr()
method returns the part of a string between
the start index and a number of characters after it.
MDN documentation
The toLocaleLowerCase() method returns the calling string value converted to lower case,
according to any locale-specific case mappings.
MDN documentation
The toLocaleUpperCase() method returns the calling string value converted to upper case,
according to any locale-specific case mappings.
MDN documentation
The toLowerCase()
method returns the calling string value
converted to lower case.
MDN documentation
The toString()
method returns a string representing the specified
object.
MDN documentation
The toUpperCase()
method returns the calling string value converted to
uppercase (the value will be converted to a string if it isn't one).
MDN documentation
The trim()
method removes whitespace from both ends of a string.
Whitespace in this context is all the whitespace characters (space, tab,
no-break space, etc.) and all the line terminator characters (LF, CR,
etc.).
MDN documentation
The trimEnd()
method removes whitespace from the end of a string.
trimRight()
is an alias of this method.
MDN documentation
The trimEnd()
method removes whitespace from the end of a string.
trimRight()
is an alias of this method.
MDN documentation
The trimStart()
method removes whitespace from the beginning of a
string. trimLeft()
is an alias of this method.
MDN documentation
The trimStart()
method removes whitespace from the beginning of a
string. trimLeft()
is an alias of this method.
MDN documentation
The valueOf()
method returns the primitive value of a String
object.
MDN documentation
The static raw()
method is a tag function of template literals,
similar to the r
prefix in Python or the @
prefix in C# for string literals.
MDN documentation
The static raw()
method is a tag function of template literals,
similar to the r
prefix in Python or the @
prefix in C# for string literals.
MDN documentation
The static raw()
method is a tag function of template literals,
similar to the r
prefix in Python or the @
prefix in C# for string literals.
MDN documentation
The static raw()
method is a tag function of template literals,
similar to the r
prefix in Python or the @
prefix in C# for string literals.
MDN documentation
The static raw()
method is a tag function of template literals,
similar to the r
prefix in Python or the @
prefix in C# for string literals.
MDN documentation
The static raw()
method is a tag function of template literals,
similar to the r
prefix in Python or the @
prefix in C# for string literals.
MDN documentation
The static raw()
method is a tag function of template literals,
similar to the r
prefix in Python or the @
prefix in C# for string literals.
MDN documentation
The static raw()
method is a tag function of template literals,
similar to the r
prefix in Python or the @
prefix in C# for string literals.
MDN documentation
The static raw()
method is a tag function of template literals,
similar to the r
prefix in Python or the @
prefix in C# for string literals.
MDN documentation
Returns the JsString
value of this JS value if it's an instance of a
string.
If this JS value is not an instance of a string then this returns
None
.
The hasOwnProperty()
method returns a boolean indicating whether the
object has the specified property as its own property (as opposed to
inheriting it).
MDN documentation
The isPrototypeOf()
method checks if an object exists in another
object's prototype chain.
MDN documentation
The propertyIsEnumerable()
method returns a Boolean indicating
whether the specified property is enumerable.
MDN documentation
The toLocaleString()
method returns a string representing the object.
This method is meant to be overridden by derived objects for
locale-specific purposes.
MDN documentation
The valueOf()
method returns the primitive value of the
specified object.
MDN documentation
This method tests for self
and other
values to be equal, and is used by ==
. Read more
This method tests for !=
.
This method tests for self
and other
values to be equal, and is used by ==
. Read more
This method tests for !=
.
This method tests for self
and other
values to be equal, and is used by ==
. Read more
This method tests for !=
.
This method tests for self
and other
values to be equal, and is used by ==
. Read more
This method tests for !=
.
Performs copy-assignment from source
. Read more
Formats the value using the given formatter. Read more
The resulting type after dereferencing.
The wasm ABI type that this converts from when coming back out from the ABI boundary. Read more
The wasm ABI type that this converts into when crossing the ABI boundary. Read more
Convert self
into Self::Abi
so that it can be sent across the wasm ABI boundary. Read more
The wasm ABI type that this converts into when crossing the ABI boundary. Read more
Convert self
into Self::Abi
so that it can be sent across the wasm ABI boundary. Read more
Returns an ABI instance indicating "none", which JS will interpret as the None
branch of this option. Read more
Returns an ABI instance indicating "none", which JS will interpret as the None
branch of this option. Read more
The wasm ABI type references to Self
are recovered from.
The type that holds the reference to Self
for the duration of the invocation of the function that has an &Self
parameter. This is required to ensure that the lifetimes don't persist beyond one function call, and so that they remain anonymous. Read more
Recover a Self::Anchor
from Self::Abi
. Read more
Tests whether the argument is a "none" instance. If so it will be deserialized as None
, and otherwise it will be passed to FromWasmAbi
. Read more
Performs a dynamic instanceof
check to see whether the JsValue
provided is an instance of this type. Read more
Performs a zero-cost unchecked conversion from a JsValue
into an instance of Self
Read more
Performs a zero-cost unchecked conversion from a &JsValue
into an instance of &Self
. Read more
Test whether this JS value is an instance of the type T
. Read more
Performs a dynamic cast (checked at runtime) of this value into the target type T
. Read more
Performs a dynamic cast (checked at runtime) of this value into the target type T
. Read more
Performs a zero-cost unchecked cast into the specified type. Read more
Performs a zero-cost unchecked cast into a reference to the specified type. Read more
Creates owned data from borrowed data, usually by cloning. Read more
🔬 This is a nightly-only experimental API. (toowned_clone_into
)
recently added
Uses borrowed data to replace owned data, usually by cloning. Read more
🔬 This is a nightly-only experimental API. (try_from
)
The type returned in the event of a conversion error.
🔬 This is a nightly-only experimental API. (try_from
)
Immutably borrows from an owned value. Read more
Mutably borrows from an owned value. Read more
🔬 This is a nightly-only experimental API. (try_from
)
The type returned in the event of a conversion error.
🔬 This is a nightly-only experimental API. (try_from
)
🔬 This is a nightly-only experimental API. (get_type_id
)
this method will likely be replaced by an associated static
Same as IntoWasmAbi::into_abi
, except that it may throw and never return in the case of Err
. Read more