constsanitize=require('check-empty-string');constuserInput=' Hello World! \u202C ';constcleanedInput=sanitize(userInput);console.log(`Cleaned user input: "${cleanedInput}"`);// Outputs: "Hello World!" Installation To usecheck-empty-string, you need to install the module using npm: ...
if(string_name.length === 0){ // string is empty } ExampleBelow is the example code given, that shows how to use the length property to check the empty string.Open Compiler var str = ''; if(str.length === 0){ document.write('String is empty'); } Following is the out...
Output of React Js Check String is EmptyExample 3 : vue js check if string is empty In this third example of this tutorial, we use Vue.js programming language to check if a string is empty or null, undefined using `str && str.trim() !== ""`. This is a common task when we ...
Vue Js Check if String is Empty:In Vue.js, you can check if a string is empty using the v-if directive along with the trim method. The trim method removes any whitespace from the beginning and end of the string, leaving only its content. You can then use
If we consider an empty string consisting of only spaces, we can usetrim()the method to remove any leading or trailing spaces before checking whether the string is empty. conststr =' ';if(typeofstr ==='string'&& str.trim().length===0) {console.log('string is empty'); ...
check.string(thing): Returnstrueifthingis a string,falseotherwise. check.emptyString(thing, options): Returnstrueifthingis the empty string,falseotherwise. check.nonEmptyString(thing, options): Returnstrueifthingis a non-empty string,falseotherwise. ...
Afterdeclaring a string variable, use the-zoperator in anif statementto check whether a string is empty or not: MY_STRING="" if [ -z $MYSTRING ] then echo "String is empty" else echo "String is not empty" fi For more Shell scripting tips,check out or Bash/Shell scripting articles!
#include <cstring> #include <iostream> #include <string> using std::cin; using std::cout; using std::endl; using std::string; int main() { string string1("This is a non-empty string"); string string2; string1.empty() ? cout << "[ERROR] string is empty!" << endl : cout <...
Check if a string is null or empty in XSLT 多条件查询 string.Format("/root/deviceList//item/guid[{0}]", strBuilder.ToString()) "/root/deviceList//item/guid[text()=\"h\" or text()=\"a\" or text()=\"c\"]"谓词嵌套var nodes = xmlDoc.SelectNodes(string.Format("/root/device...
check.emptyString(''); // true check.emptyString(' '); // false check.emptyString(0); // false check.emptyString([]); // false check.emptycheck.empty([]); // true check.empty(''); // true check.empty({}); // true check.empty(0); // false check.empty(['foo']); //...