classList.contains(classNameToCheck); 4. 返回检查结果 最后,我们可以将检查结果(布尔值)返回或者根据需要进行进一步的操作。 完整示例 将以上步骤结合起来,我们可以得到如下的完整示例: javascript function checkClassExists(selector, className) { var element = document.querySelector(selector); if (element)...
1、classList.contains() classList.contains()方法可以检查元素是否包含某个类名,返回一个布尔值。 例子 let div = document.querySelector('div'); if (div.classList.contains('check-class')) { console.log('Class exists'); } else { console.log('Class does not exist'); } 2、classList.replac...
const checkIsDisable = element => { let classList = element.classList; return classList.contains('disable') || classList.contains('loading'); }; upload_inp.addEventListener('change', async function () { let file = upload_inp.files[0], data; if (!file) return; upload_button_select.cl...
set.InstructionsUsing the buttons below you can either train a new model from scratch or load a pre-trained model and test its performance.If you train a model from scratch you can also save it to browser local storage.If you load a pre-trained model you can edit the properties in first...
// We need to check if Module already exists (e.g. case 3 above). // Substitution will be replaced with actual code on later stage of the build, // this way Closure Compiler will not mangle it (e.g. case 4. above). // Note that if you want to run closure, and also to use...
get_class_vars get_declared_classes get_declared_interfaces get_declared_traits get_object_vars get_parent_class interface_exists is_a is_subclass_of method_exists property_exists trait_exists Ctype ctype_alnum ctype_alpha ctype_cntrl ctype_digit ctype_graph ctype_lower ctype_print ctype_punct ctyp...
get_class_methods get_class_vars get_declared_classes get_declared_interfaces get_declared_traits get_object_vars get_parent_class interface_exists is_a is_subclass_of method_exists property_exists trait_exists Ctype ctype_alnum ctype_alpha ctype_cntrl ctype_digit ctype_graph ctype_lower ctype_prin...
(property)) } // Add class function _addClass(el, token) { el.classList.add(token) } // Remove class function _removeClass(el, token) { el.classList.remove(token) } // Get time format function timeFormat(time, options) { // Video's duration is Infinity in GiONEE(金立) device ...
5.`arrayToHtmlList`:数组转`li`列表 此代码段将数组的元素转换为标签,并将其附加到给定ID的列表中。 代码语言:javascript 复制 constarrayToHtmlList=(arr,listID)=>(el=>((el=document.querySelector('#'+listID)),(el.innerHTML+=arr.map(item=>`${item}`).join('')))();arrayToHtmlList(['...
Remove message if(path) { Existsremove() pathExists = null } } } // Checkif all fieldsare filledout and path doesn exist function canEnable() { if (routeTitle.value() && routePathvalue() && !paths.includesroutePathvalue().toLowerCase()) { addRoute.enable(); ...