HTML
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<ul class="stepper" id='stepper' data-mdb-stepper-init>
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<li class="stepper-step stepper-active">
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<div class="stepper-head">
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<span class="stepper-head-icon">1</span>
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<span class="stepper-head-text">step1</span>
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</div>
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<div class="stepper-content py-3">
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Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor
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incididunt ut labore et dolore magna aliqua
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</div>
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</li>
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<li class="stepper-step">
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<div class="stepper-head">
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<span class="stepper-head-icon">2</span>
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<span class="stepper-head-text">step2</span>
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</div>
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<div class="stepper-content py-3">
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Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip
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ex ea commodo consequat Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip
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ex ea commodo consequat Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip
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ex ea commodo consequat Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip
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<button class='toggler'>
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show element
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</button>
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<div class="d-none hidden-el">
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ex ea commodo consequat Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip
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ex ea commodo consequat Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip
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ex ea commodo consequat Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip
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ex ea commodo consequat Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip
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ex ea commodo consequat Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip
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ex ea commodo consequat
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</div>
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</div>
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</li>
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<li class="stepper-step">
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<div class="stepper-head">
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<span class="stepper-head-icon">3</span>
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<span class="stepper-head-text">step3</span>
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</div>
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<div class="stepper-content py-3">
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Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu
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fugiat nulla pariatur
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</div>
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</li>
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</ul>
CSS
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JS
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const toggler = document.querySelector('.toggler')
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const hiddenEl = document.querySelector('.hidden-el')
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const myStepperEl = document.getElementById('stepper');
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const stepper = new mdb.Stepper(myStepperEl);
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toggler.addEventListener('click', () => {
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hiddenEl.classList.remove('d-none')
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stepper.resizeStepper()
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})
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Console errors: 0