knockout.js - How to link checkbox and text value using knockout? -

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i want clear text box when checkbox unchecked.

this html:

<input type="checkbox" id="chkminfixcharge" class="left"      data-bind="enable: isenableminfixedcharge,checked: ischeckminfixedcharge" />  <input type="text" id="txtminfixcharge" class="minitext left"      data-bind="value:?????" style="margin: 0px 10px;" />

use line of code you

value:ischeckminfixedcharge()? urdefinedvariable:''

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