how to remove trailing and leading spaces from textbox input-CodePudding

if I have something like this:

  return array.map(item => (
<input type="text" value={item.name}> onChange ={(name) => changeItemName(name.target.value)}

where the changeItemName function is basically a function that will change the name attribute of the current item. How can I go about making sure that the name attribute wont have any trailing or leading spaces? I can do something like this in my changeItemName function:

changeItemName(name){
name.trim()
... logic to change name of item }

However since I am using onChange(), this method is called everytime a character is typed. This means that if a user types a regular space between 2 words, this wouldnt work because the name passed into the function would be trimmed thus now allowing any spaces. How can I tweak this so that spaces still work but leading and trailing white spaces are gone?

CodePudding user response：

You can trim the name when the user finished typing. For example when the input got out of focus. Try this:

<input type="text" value={item.name}>
    onChange ={(name) => changeItemName(name.target.value)}
    onBlur={()=> { item.name = item.name.trim() }} 
/>

Here the onBlur function would fire when user goes to some other input or other part of your website.

CodePudding user response：

There are several options, one is to use a debouncing function that will trim the input after the user stops typing for a couple hundred milliseconds. The other option is to trim the input on the blur event.