Commit b42e691
Some DOM selector helpers
Changed files (4)
Diff
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Returns first matching element if multiple are found.+pub fn get_element(selector: &str) -> Option<HtmlElement> {+ let window = web_sys::window().ok_or(Error).ok()?;+ let document = window.document().ok_or(Error).ok()?;+ let elements = document+ .query_selector_all(selector)+ .map_err(|_| Error)+ .ok()?;++ if elements.length() == 0 {+ return None;+ }++ if elements.length() > 1 {+ log!(+ "Expecting a single element, found {} instead.",+ elements.length()+ );+ }++ if let Some(node) = elements.item(0) {+ if let Ok(element) = node.dyn_into::<HtmlElement>() {+ return Some(element);+ }+ }++ None+}++pub fn node_list_to_vec(list: NodeList) -> Vec<HtmlElement> {+ (0..list.length())+ .filter_map(|i| list.item(i))+ .filter_map(|node| node.dyn_into::<HtmlElement>().ok())+ .collect()+}++/// Queries the document for all elements matching the given selector.+pub fn get_elements(selector: &str) -> Vec<HtmlElement> {+ let window = web_sys::window();++ if window.is_none() {+ return Vec::new();+ }++ let document = window.unwrap().document();++ if document.is_none() {+ return Vec::new();+ }++ let elements = document.unwrap().query_selector_all(selector);++ if elements.is_err() {+ log!("Failed to query selector all: {:?}", selector);+ return Vec::new();+ }++ return node_list_to_vec(elements.unwrap());+}++/// Sets the inner HTML of the first element matching the given selector.+/// Returns an error if no element is found.+pub fn inner_html(selector: &str, html: &str) -> Result<()> {+ let window = web_sys::window().ok_or(Error)?;+ let document = window.document().ok_or(Error)?;++ let elements = document.query_selector_all(selector).map_err(|_| Error)?;++ if elements.length() == 0 {+ return Err(Error);+ }++ for i in 0..elements.length() {+ if let Some(node) = elements.item(i) {+ if let Ok(element) = node.dyn_into::<Element>() {+ element.set_inner_html(html);+ }+ }+ }++ Ok(())+}++/// Sets the inner text of the first element matching the given selector.+/// Returns an error if no element is found.+pub fn inner_text(selector: &str, text: &str) -> Result<()> {+ let window = web_sys::window().ok_or(Error)?;+ let document = window.document().ok_or(Error)?;++ let elements = document.query_selector_all(selector).map_err(|_| Error)?;++ if elements.length() == 0 {+ return Err(Error);+ }++ for i in 0..elements.length() {+ if let Some(node) = elements.item(i) {+ if let Ok(element) = node.dyn_into::<Element>() {+ element.set_text_content(Some(text));+ }+ }+ }++ Ok(())+}++/// Sets the inner HTML of the first element matching the given selector, if one exists.+pub fn try_inner_html(selector: &str, html: &str) {+ let _ = inner_html(selector, html);+}++/// Sets the inner text of the first element matching the given selector, if one exists.+pub fn try_inner_text(selector: &str, text: &str) {+ let _ = inner_text(selector, text);+}